I may as well add my list to the fray:
Xbox exclusive 360 shooters:
Gears 1: 94%
Halo 3: 94%
Gears 2: 93%
Left 4 Dead: 89%
Call of Duty 2: 89%
PS3 exclusive shooters:
Killzone 2: 92%
Resistance 2: 87%
Resistance 1: 86%
So you can see the Xbox 360 is untouched in depth, and bredth of content in terms of shooters. The notable PS3 shooters can easily be substituted for a flavour of COD if you wish as they are more similar than the Xbox 360 examples.
Xbox 360 exclusive RPGs:
Mass Effect WRPG 91%
Fable 2 WRPG 89%
Tales of Vesperia JRPG: 81%
Blue Dragon JRPG: 79%
Lost Odyssey JRPG: 78%
Star Ocean IV JRPG: 78%
PS3 exclusive RPGs:
Valkyria Chronicles SRPG: 87%
??? I can't see any others.
Anyway even if I missed some, the Xbox 360 has a clear lead in WRPG type games and probably JRPG available in the west if I haven't missed any.
So if you don't intend to weigh each game individually then just from the variety I have to call the Xbox 360 the best lineup available at present in your chosen genres.
Tease.
