head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Execution · Practiced Mastery
A grid-based bomber where reading human opponents' placement decides multiplayer matches.

Execution · Competitive PvP
Reversal timing and pacing against an opponent baiting your counters.
Super Bomberman R leans Execution (Practiced Mastery); WWE 2K15 leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Super Bomberman R
bomb placement and dodge timing
WWE 2K15
Reversal timing windows decide most exchanges
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Super Bomberman R
human opponents can be out-predicted in placement
WWE 2K15
Human opponents bait reversals and vary move timing
Super Bomberman R leans a little harder on variance, though the gap is small.
Super Bomberman R
power-up spawn randomness
WWE 2K15
Chain-wrestling rock-paper-scissors minigames add randomness
Super Bomberman R leans a little harder on optimization, though the gap is small.
Super Bomberman R
map knowledge and item-priority optimization
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.