I chose MGS4 because it had one of the best stories ever.
@OP what are you thinking with these comparisons!? Surely the obvious choices should've been
Halo Reach vs Killzone 3
Gears of War 2 vs Uncharted 2
SC: Conviction vs Metal Gear Solid 4
Forza 3 vs GT5
Alan Wake vs Heavy Rain
^^That's how its done. Your comparisons are a bit...well...l_a_m_e