Resistance 2 single gameplay will be shown only on June 13th. =)
Some sources says, that game will look better then teaser(well Ratchet look like pixar movie..).
For now,
~3 mln. Resistance
vs
~5 mln. GeoW
But, Resistance make around 120-130k monthly while geow around 40-50k.
So, by the end of year(7 months), if sales rate won`t change:
~4 mln. Resistance
vs
~5,5 mln. GeoW
Both games are hyped, though Geow a little more. :)
Resistance 2 will have 60 players online, 2 story lines(1 for co-op), and probably will look amazing.
GeoW 2 will be Bigger Better Longer. =)
I think Both games will do ok and probably similar in terms of sales and scores. =]
Every 5 seconds on earth one child dies from hunger...
2009.04.30 - PS3 will OUTSELL x360 atleast by the middle of 2010. Japan+Europe > NA.


Gran Turismo 3 - 1,06 mln. in 3 weeks with around 4 mln. PS2 on the launch.
Gran Turismo 4 - 1,16 mln. with 18 mln. PS2 on the launch.
Final Fantasy X - around 2 mln. with 5 mln. PS2 on the launch.
Final Fantasy X-2 - 2.4 mln. with 12 mln. PS2 on the launch.
1.8 mln. PS3 today(2008.01.17) in Japan. Now(2009.04.30) 3.16 mln. PS3 were sold in Japan.
PS3 will reach 4 mln. in Japan by the end of 2009 with average weekly sales 25k.
PS3 may reach 5 mln. in Japan by the end of 2009 with average weekly sales 50k.
PS2 2001 vs PS3 2008 sales numbers =) + New games released in Japan by 2009 that passed 100k so far