head to head
Neither is simply harder - they are hard in different places. Guilty as Sock! demands more reads; WWE 2K15 demands more execution.

Reads · Pure Mind Games
An online party game about improvising arguments to persuade human judges.

Execution · Competitive PvP
Reversal timing and pacing against an opponent baiting your counters.
Guilty as Sock! leans Reads (Pure Mind Games); WWE 2K15 leans Execution (Competitive PvP).
WWE 2K15 leans clearly harder on execution.
Guilty as Sock!
No twitch input; it's a talking party game
WWE 2K15
Reversal timing windows decide most exchanges
Guilty as Sock! leans clearly harder on reads.
Guilty as Sock!
Persuading human players and judges is the core
WWE 2K15
Human opponents bait reversals and vary move timing
Guilty as Sock! leans a little harder on variance, though the gap is small.
Guilty as Sock!
Absurd evidence cards add hidden, random elements
WWE 2K15
Chain-wrestling rock-paper-scissors minigames add randomness
WWE 2K15 leans clearly harder on optimization.
Guilty as Sock!
Little system to solve beyond rhetoric and bluffing
WWE 2K15
Move sets, stamina and match pacing are learnable systems
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.