There isn't much difference in the character models (SMS does look a little better) but SMG pwns SMS in the background and stage design and graphics departments

It is all to do with 3rd party, and PS3 is just crap at the moment because not many 3rd partys want to help it as it costs so much to make a game for it. Wii is getting it all because its cheaper and easier to make games for it. Microsoft is rich so they're getting support, so thats why i've got a wii and 360 this gen

COD4 will be my 1st 360 shooter, probably shortly followed by army of two because me and my friend love 3ps shooters together, i want all of these shooters but these 2 are topping my list