the differences between 3.x's and 4.25 are:
1.) the amount of weapons available
2.) the long plasmabomb would wipe everyone on space-wfa no matter where you were, and the defuse rate was like 2/10 chance
3.) the lightning gun was this bolt-like gun for the borg
4.) the sentry lagged the server out when it was tracking
5.) just about every other effect was messed up performance wise.
i did a port of every source of q2wf immaginable, from the beginning to the end, so i could track back changes. it can be tweaked (except for the lightning gun and the pb distance) via mock to be like any other release.
