OK, let's try. Here's the sales shares of PS3 and 360 in America, compared with the old data:

As you can see, there's some more FPS+Shooters for PS3 in America (27% vs the 24% of the worldwide share) but still much less than the 44% of the 360 in America.

The attach rates for FPS+shooters amount to 0.89 for PS3, 1.70 for 360. The differential is +0.81 (+91%) and is thus bigger than the worldwide one both in absolute and relative terms.

The real big difference for PS3 in America is in the "other" genre, actually... once again Rock Band and Guitar Hero games. Now this is a genre that seems to really be deeply rooted in the american market.

Sadly, I can't as easily get the ordered sale data for others and Japan. I would have liked to include the 360 in others+Japan in there.

Edit: added the 360/America data

interesting how that changes the numbers.  The sports caught my eye, they are almost equal in America, but 360 trails by quite a bit worldwide.  Is this due to soccer games and the 360's crappy d pad?

hmmm, I guess my hypothethis is inccorect, but this is just the top 25 games correct?  It might be different if we compiled all the data.  Of course, I'm not asking you to do that, that would be pretty much impossible.  Still, it might change the numbers.

It also sucks that there isn't an other or japan data.  That would have been pretty interesting to see.  What do you think the rpg attach rate would be for the 360 there, 80%?  Seems like the only reason japanese buy the system.

^Yeah, the difference in sports is that PS3 and 360 are both strong with Madden and baseball games in America, but the PS3 keeps it up with soccer games in the rest of the world, whereas the 360 plummets - relatively to other genres, at least.

As for RPGs in Japan they amount to about 1.48M (potentially big rounding error here), ie about 29% share of all the 360 game sales.

And yes, it would be nice to extend this to more titles than the top 25, but there's no easy way to do that past the million sellers worldwide, as far as I know (that limits it to 30 titles). Maybe with the 2.0 version of the website we'll have more tools to play with :)