Considering it is just a shooter now, PS3 WW numbers for the game will not even reach NA numbers. Had this game been the survival horror the first 3 were that would be another story, for one Japan sales for the game would actually be good unlike what the numbers will be now.
Then the UK comes where 360 versions sell best so 2 huge areas where RE5 will sell better on the 360 by far. 360 beating PS3 sales for RE5 2:1 with the same going for SF4.