I can't truly tell you what the Viggen and Draken 'do' better as raw numbers of turn rate and so forth but I can make some fairly vague inferences based on rep.
The Draken was, for it's age and thrustloading, an outstanding quick-climb point defender. However it was also a good deal like an F-16XL without the FBW in that it was 'twitchy' and as unit-experience developed, only the best pilots were assigned to it and then never first-tour.
It had a pretty lousy weapons system, largely dictated by the airframes tiny size and the relatively few available radar-missile choices.
And though the Swedes supposedly improved the RB.27/28 it would not be somethign you would want to take up against even a Gen-II (F-4/MiG-23) threat at altitude.
Fortunately, at least at the time it was doing primary service, there were parts of the Bothnian Gulf which were without radar and this allowed snapups and diveaways which both 'sides' supposedly exploited in combats whose results are only known to the fishes. Against a MiG-17/19 (fifties, which is what makes the Draken so 'wow') threat it should be both angles and energy dominant and against a MiG-21F/PF it should be at least competitive.
Any later and I just don't know (it's going to start to lose on fuel and thrust very rapidly but so much of what they do over there is based on sudden-ambush and datalink quiet vector such that this may not matter).
The Viggen is something of a myth to be truthful. It has a lot of base drag and when you start to push those big (flapped, not all moving) canards around in a turn it gets even worse riding a fairly stable CG margin and a huge deltawing.
It is very stable and has good thrust loading (for the era) however which means you can do tricks with it at low level that can pitch-and- spitout a MiG-21/23 type threat and it is known that the Viggen pilots frequently stalled at least their WARPAC dancing partners right on into the drink this way.
Part of this may be pilot quality, the Flygvappen put in a lot of hours for a nation their size and until recently they kept their experience levels pretty high in-wing (no ladder climb BS) too.
The AJ's lack of a fixed gun and the early reliance on Falcon again makes life more difficult than it should have been however and this gets particularly iffy when you're doing strike and have to make choices on EW/guns/AAM/bombload.
The Jakt Viggen is a whole 'nother can of worms and though it comes up short on combat persistence (the RM.8b sucks gas even worse than the 8a I'm told and you've only got two short-pol BVR shots) it was, for a time, the only jet with Eagle-equivalent LDSD in Europe. It likely even had a better seeker: clutter pullout (Skyflash i-monopulse).
However; in a 1:1+, 17Klb GWE world, it's 40K 'low slow all day' style of MiG-eater combat could not overcome it's conventional CG design limits and the physical performance shortcomings of STOL-specific optimization on lift.
This became clear in the first 'Eurofighter' (Deal of the Century) competition against the Mirage F-1E and F-16 prototypes where it was consistently beaten down in visual-range performances by both the other players (the JA-37 BVR-radar capability debuted after this IIRC, the Saab-37X being a hodgepodge of AJ ground attack avionics/weapons and JA airframe features) as well as on range ayload ones.
The neato things about the Swedes (for a game) are the way they take things so /seriously/ in terms of total-system-of-systems approach. And have, for a long time.
The STRIL-60 is a /literal/ term in that it has been around since the 1960's and gives you a SAGE+ type datalinked ground environment that, coupled to automated navigation aid (maps and later digital maps) around their own countryside makes it easy to get into and out of the combat areas using multiple overlapped, shortradius coveraged bases and gun-SAM defenses.
Speaking of which, the Swedes are also into EW and were among the first to put BIG podloads of both ECM and EXCM on a fighter, probably because of their 'exposed' neutrality maintenance tactical bias and subsequent overwater needs.
Lastly, they take roadbasing and rapid-turn capabilities to heart. It probably doesn't make much difference in an era of AWACS and Cruise but in the days when a _man_ bombed and 'look down shoot down' was rocket pods and rolling the airplane to look out your canopy, it was a pretty-deep insight.
To a player all of this can be wrapped up into three basic 'kewl!'s
1. Sophisticated A/G sensors and Nav.
Datalink, good Ground Mapping, dedicated Recce tools and both AShM 'beach killer' and pseudo-TFR badweather laydown strike options.
2. Shortfield Recovery.
Into and out of 2,000-2,500ft fields. Even the Draken was pretty good with the tail bumper wheels and two drag chutes almost as big as it was. The Viggen was KING however with the semiautomatic MLS autopilot linked flaps and wheels-on reverser modes (predating Tornado by a long ways).
Imagine landing in a short-strip between rows of 70ft tall conifers from a 100ft ceiling with a 30 knot crosswind and blowing snow as your only 'guide'.
As soon as you touch down, the reverser kicks (so go around is minimally optional) and then about 4 seconds of 4G later, there are the blinking lights of a follow-me truck/motorcycle to get you to your hardstand.
Turn around, fold the tail and kick the reverser to back into the net coverred revetment where a team of four-six conscripts are /all over/ your jet doing a hot turn to get back out to that damnable Soviet Marine landing force totally ruining your X-Mas...
3. Unique Progressions/Weapons/Campaigns.
You start primitive (tail chase/hot metal) and gradually build up to some pretty unique (RB-04/05, Baron pods, IRST, FQ radar-Falcon and almost every AIM-9 model ever made) capabilities. Especially later in life it should also be noted that the SweAF had an ever increasing number of 'friendly but still foreign' intrusions by everything from RF-84s to RF-4 to Nimrod and of course the notorious 'Bodo Express' SR-71's to deal with. In the mid-late 80's this peaked out to about 70-80% NATO advantaged intrusions. The Russians actually did more 'show off' type work with first-peak on a lot of new platforms coming via Swedish formation-flyby-foto. MiG-25, Tu-26, Il-18 (thousand variations) and MiG-29 all come to mind. And of course there was the 'secret NATO' agreement to stand by us if the push really came to shove. That could mean everything from recovering (sunk) carrier aircraft off the Kola to 'ignoring' certain overflights into the Leningrad/Byelo district railyards and cooperative interdiction/mining escort of Soviet Marine units trying to start a naval front in Denmark or North Germany.
The Mir-2K05 I can't say much about. I don't have the data. MICA is cool (if only because it gives you back the wingtanks) and their EW is pretty good I hear (largely because ICMS is based on Spectra tech). But overall the 2000 is still short of a lot of the 'necessaries' in my mind to make a useful weapons platform, fuel/SFC and thrustloading for one, and weapons-mix alternatives (particularly SEAD and point-strike smaller than ARMAT/AS.30) for another.
Tornado is another post-subject...;-)
I can recommend Bill Gunston's 'Early Supersonic Fighters of the Fifties' (or close) as a good idea of what the Draken was when it first came online and the FTA:
though largely Finnish-AF related, could likely give you some good backdoors into both Draken and Viggen SweAF 'operational' wingsites. Jarmo Lindberg is somehow linked to this bunch as well as RAM newsgroup and he is a very technically knowledgeable source on Swedish doctrine.
Urban Friedrickson's Draken/Viggen/Gripen sites are fairly well updated tech sources at-
And Lastly this one- http://www.f10.mil.se/35/j35a.html
Covers most of the Draken models with good photos and sideview paintings.
Swedish Armed Forces http://www.mil.se/index_e.shtml