Sorceror is far easier in some places. In others, it's hell. Ever tried taking out one of those royal guard giants in Anor Londo with a staff and dagger? Ain't easy. Not to mention O&S themselves, who I'm afraid to take on without some very heavily armoured thugs to tank hits for me.
Also, fuck Nito and his minions. One guy hits me, everyone else takes the chance to dogpile stunlock.