What I actuall meant is that in the case of FV13 it was first designed as a PS3 exclusive (see for instance Bayonetta, which following the discussion here was designed as a Xbox360 exclusive, causing much trouble while porting to the PS3 afterwards). In the case of Burnout Paradise, they lead on the PS3 but designed it as a multiplat. I don't know if we ever had such a case, where a PS3 exclusive (without the Xbox360 in mind while developing) gets ported to the Xbox 360. For instance a scenario like this: ND is bought by MS and they start to port UC2 to the Xbox360 (I know, will never happen, just an example).
I thought that maybe FV13 fits to this scenario, but the problem is, that we cannot be sure, about FV13 as they maybe knew right from the beginning that FV13 goes multiplat.