G2 actually seems better without scream
How exactly do they seem better?
Kinguin
vs Natus Vincere 2 - 0
vs Titan.CS 2 - 1
vs Natus Vincere 2 - 1
vs E-frag 2 - 0
vs Team Solomid. 1 - 2 (Double Overtime x2)
vs Natus Vincere 1 - 0
vs mousesports.CS 1 - 0
vs Flipsid3 Tactics 2 - 1
Those were their last matches together as Kinguin and that is not showing majority of the other T1-2 teams they crushed (16-0 VP).
Now though i would assume G2 has better communication although Fox doesn't really fit, but overall G2/Kinguin has been a GREAT team and has always been underrated.