Your understamating the power of Kratos
God of War Collection stands 0.61m A remastered game sold almost on par with
demon's souls, dragon age and outsold borderlands, bioshock, an many other great games in the realese time frame
Chains of Olympus sold 2.03m psp games barely hit a million
that means it has to be a mainstream game to reach those numbers
spacially for psp when everyone in the world can paritate games for it,
so based on that god of war is a superior franchise but it has a lot of competetion so it can go iether way
but it will outsell FF XIII in NA and Europe.