I drove better (relative to the rest of the class) the few times I was on factory 15" ZX3 rims with RS-A tires (195/60R15). The rest of the time I was on 16x7 Enkei 5+ rims with 205/50ZR16 Kumho 712 tires. Suspension and everything else was more or less the same (actually, I think I had a FS front bar on with the 15"s
, then I pulled it since it was rubbing badly on my Iceman). I don't know exactly what to make of that. What brand/model tires do you have on each set of wheels?
Also, what type of tranny do you have in each? Do you have a ZETEC in the SE Sedan?

Also, what type of tranny do you have in each? Do you have a ZETEC in the SE Sedan?