I think we're a bit better actually especially when Crabtree returns.
Offensive line might be better since guys like Iupati, Davis, and especially Boone haven't hit their ceilings yet.
WR corp outside of the Crabtree loss is better. Boldin is going to be far more useful than Moss and everybody is going to be more useful than Ginn and Jenkins.
RB I say we're roughly the same.
TE could go either way. Davis sounds like he might be more a productive pass catcher and we just don't know for sure what McDonald is going to bring to the table this year especially compared to what Walker brought last season.
DL I think we're better with Williams at NT and the depth overall has improved.
OLB we're better
ILB about the same
Secondary might be the one are you could say we got worse. Cox I believe will be better but we still haven't seen Nnamdi and Reid really get tested yet though. Brown and Rogers I expect will be par for the course.
Most importantly I expect Kaepernick to be much better with getting those early starts last season out of the way and having a full offseason as the number 1 guy. So I expect the offense to be much more creative this season than last.
About the same my ass. 49ers have 2 of the absolute best ILBers in the game. If they keep performing as they have they might be the best duo of ILBers on a team ever. Seattle does not have that. They have good ILBers but they do not have great ones like the 9ers do.