At KPMG, grad scheme, TS pays better than CF which pats better than tax (i think) which pays better than audit. Not much in it, but there is a bit of variation.
Even within Audit, the hours vary. Guys in FS are working a lot of 2am-ers (apparently) and those in public sector are managing a much nicer 9.00-5.30 on the same money! It also varies over the year. Busy season (now) is harder work than July, for example.
Getting stcuk on a client also depends on what sector you go into (london speciifc, regional offices are broader based). Get into FS and you might spend half/all your time at one the client you're on. Go into ICE and you might have a lot more smaller ones. Or get lumbered with a big 'un!
Grad schemes? You'll be doing work a 5 year old could do for the first 1.5 years, no matter where you go. zzz. ;-)