there are a couple of reaons why the ps3 version should be more popular than the xbox version
1) Ryu >>> Crimson Viper...
to the nth degree...Who does crimson think shes is... HONESTLY
2) Free PSN > XBL
if you have an xbox and don't pay for the live service, why buy a copy of a game that you NEED to shell out extra money to play online when you can do it for free... i KNOW that most people who have a 360 already have XBL, but..there might be SOME who do not... therefore they will go for the ps3 version
3) Blu-Ray > DVD
I am fully aware that the xbox version's dvd is specially formatted to provide higher resolution.. but blu-ray has to be better... I will also say that the average person/gamer MIGHT not know about the xbox's higher resolution.. so they would automatically ASSUME that the Blu-Ray is better
4) Capcom and Sony have a pretty good relationship... it is possible that the supply was in shorter demand from the get go
5) The fact that Amazon or DD sold out of the PS3 version first.
This could have caused a mass havok and hype where everyone feels that this release is much more limited. As a result, they have to act now because they wont be able to buy it on clearance later... So people who were "on the fence" about the ps3 CE release (i am guilty of this too)... felt they just HAD to buy it