head to head
WWE 2K15 asks more than Dragon Ball Z: Ultimate Tenkaichi, and the gap is execution.

Reads · Competitive PvP
Spectacle fighting reduced to rock-paper-scissors prediction in clash moments.

Execution · Competitive PvP
Reversal timing and pacing against an opponent baiting your counters.
Dragon Ball Z: Ultimate Tenkaichi leans Reads (Competitive PvP); WWE 2K15 leans Execution (Competitive PvP).
WWE 2K15 leans clearly harder on execution.
Dragon Ball Z: Ultimate Tenkaichi
Simplified inputs flatten the physical ceiling
WWE 2K15
Reversal timing windows decide most exchanges
Dragon Ball Z: Ultimate Tenkaichi leans a little harder on reads, though the gap is small.
Dragon Ball Z: Ultimate Tenkaichi
Clash minigames are near rock-paper-scissors against humans
WWE 2K15
Human opponents bait reversals and vary move timing
Dragon Ball Z: Ultimate Tenkaichi leans a little harder on variance, though the gap is small.
Dragon Ball Z: Ultimate Tenkaichi
Guessing-game clashes inject coin-flip outcomes
WWE 2K15
Chain-wrestling rock-paper-scissors minigames add randomness
WWE 2K15 leans a little harder on optimization, though the gap is small.
Dragon Ball Z: Ultimate Tenkaichi
Character knowledge matters but systems are shallow
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.