GP3 Pros:
1.GP3 has many many more carsets and carshapes.
2.GP3 is much easier to edit and to install many addons to.
3.There is an addon that allows you to have replays of up to two hours in duration in GP3, while GP3-2000 only allows you to have replays no longer than ninety minutes, which is not enough to even record full length dry races at slower circuits such as Monte Carlo or the Hungaroringm, and isn't enough to allow you to record full length wet races at most any circuits.
4.Most all original and addon GP3-2000 tracks can be used in GP3. (In fact, out of over 200 tracks, I think that I have encountered no more than two GP3-2000 tracks that will not work in GP3, and, of those, there is a GP3 version of one of them.)
5..I prefer the GP3 menu music to the GP3-2000 menu music.
GP3-2000 Pros:
1.GP3-2000 has very slightly better AI.
2.GP3 has better damage modelling (although GP3 damage can be adjusted to be nearly as good) and damage from collisions with debris (which GP3 does not have).
3.GP3-2000 allows the use of 2 different car liveries for each team (very usefull and realistic for CART, for example), whereas GP3 only allows the use of a different single car livery for each different team.
4.GP3-2000 has EAX sound effects such as reverberation effects when going through a tunnel. However, this reverberation effect also occurs when going under a track bridge or banner, which I find completely unrealistic, and , therefore, choose to turn this effect off.
5.GP3-2000 allows extremely slighthly more detailed tracks, however, practically speaking, there is usually no difference at all between most all GP3 and GP3-2000 addon tracks in terms of graphical details.
6.GP3-2000 allows different AI car setups in qualifying and races, which means that it is possible to more accurately replicate real-world qualifying and race laptimes in GP3-2000 than it is in GP3. As this takes quite a bit of time and effort, it is probably fair to say that most GP3-2000 performance files (which are usually produced very soon after a real-world race) do not take full advantage of this possiblity.
7.GP3-2000 uses different performance files for each track, while GP3 uses one single performance file for an entire season. This means that you can fairly accurately recreate the performances of all of the AI cars and drivers in each individual race in GP3-2000, which you cannot do in GP3. However, this means that it takes as many more times as there are races in a season to make a season's performance file for GP3-2000 as it does for GP3, which is the reason that so few seasons' performance files have been made for GP3-2000 and not enough work as been done testing even those, as can be found from either testing them yourself or from reading the many forum complaints about unrealistic performances and results in GP3-2000.
Summary:
If you are interested in just the most recent seasons since the year 2000, then GP3-2000 would probably be the best choice. If you are interested in any other motor racing seasons, such as Formula One, F 3000, Caterham, etc., before 2001, then GP3 would be far the better choice.
Post Edited (09-04-03 13:28)