Well in my personal opinion those games sell worse due to their nature - FPS style, it is a common knowledge that the US tend to like shoot 'em ups, closely followed by us, the Europeans. Japanese on the other hand, hate them - or most of them do anyway. If you look at the sales of the common JRPG - Final Fantasy XIII you will see that on the release week the Japanese alone have brought over 1.5M copies in the first week, whereas America and Europe matched about a third of that, each.
Comparing that to the infamous monster on PS3 - MGS4, MGS4 has scored 1.7M in the first week, 480K of which were in Japan, after that the sales have begun to deteriorate as is the case with most games, considering that the Japanese had created the same boost, the sales would have been borderline 3M on the first week(2.8-2.9) giving it a good boost and possibly putting it ahead of the Gears 1 or even Gears 2 given time and Japan adaptation.
Same could be said with many other games that are exclusive to PS3, most tend to be FPS which only mainly sell to Europe and US whereas the JRPG/RPGs tend to sell well in Japan, so technically.. Combining both of them together to make a hybrid FPS/JRPG would be a good thing right? Wrong, Resonance of Fate has failed in that aspect.
There are two different markets in PS3 industry, and it is impossible to touch both to achieve the maximum sales for the software. However if those exclusives that you have listed would have been launched worldwide on all platforms, including 360 I would be willing to bet that the sales on 360 would be at least equal or higher than the ones on PS3, simply because FPS is a bigger market for the 360.
Conclusion: You can't get the much needed sales boost from the Japanese if you want to keep the others satisfied, attempting to keep both parties satisfied will just result in a massive flop.
As someone has mentioned racing on the other hand.. Seems like an aspect that will interest both and will probably rival the Halo franchise, although the Halo franchise now stands at around 28M sales worldwide including all of the Halos on consoles.
Once the sales for SC:Conviction are out,
I MIGHT be willing to bet that I will eat my hat(I will purchase one for such occasion)if the sales of MGS:Rising are higher on PS3 than on 360.
P.S Above are my opinions and speculations
The history is written by the Victors.
