I think I can actually give you one... though it's not distinctly why one is "better or worse" just what each can do and what each can't.craddoke said:Basically, I've never heard a truly coherent argument for why one edition of DnD is better than another - its all opinion based on individual playing experiences that have more to do with the chemistry of the specific people involved (or just outright uninformed prejudice). In other words, if someone asked me to join their DnD game, I would never use the edition they preferred as a litmus test for whether I joined them or not.
Essentially, 3.5 can do almost everything 4th Ed can do, just not necessarily better. Want Cinematic Fantasy in 3.5? Alrighty then, throw in Vitality Rules and use Pathfinder's base HP method. Also allow for Skill Tricks ala "The Complete Scoundrel" and allow more of the crazy high powered stuff from Book of Nine Swords. However this requires additional books and at the end of the day 4th Ed with it's Powers does just as good a job of presenting quick, high action Cinematic Fantasy.
However you couldn't, for example, run a gritty dungeon crawl in 4th Ed, it wasn't designed for grit whereas base 3.5 is pretty much perfect for it. You also couldn't really run say... a court intrigue game with 4th Ed, or a good spy game with 4th Ed like you could with 3.5. However while 3.5 DOES allow you to run these kind of games, it's not really a good system for it. Skill Checks in 3.5 are, for lack of a better word, boring and thus so are non-combat encounters. At the end of the day DnD, no matter the edition, is a game about Combat and Team Based Tactics. There are FAR better games out there for doing what many people claim 3.5 does better than 4th Ed.
Essentially I guess, people say 3.5 does certain things better than 4th Ed, which is true, but it still doesn't do them well.