A few of the server settings appear to differ from the original settings, yes. Effects can now be viewed on other players and NPCs, and I don't think leveling up guarantees the maximum hit points either.
A few of the values, if I'm not wrong, need set. Under the nwnplayer.ini:
ShowDMJoinedMessage=0 (So DMs can log on quietly as before)
Max Hit Points=1 (No more silly 're-rolls' for half an hour straight, one also previously used)
Saving Throw Automatic Failure On 1=0 (A confusing one to some, but the one that fealhach2008 refers to, and that I recall)
Examine Effects On Creatures=0 (Prevents people from viewing bonuses and such on other NPCs and PCs)