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

Execution · Competitive PvP
Arcade wrestling that tests reversal timing and little else by design.

Execution · Competitive PvP
Reversal-timing duels where humans bait each other inside scripted spectacle.
WWE 2K Battlegrounds leans Execution (Competitive PvP); WWE SmackDown vs. Raw 2011 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.
WWE 2K Battlegrounds
Button-mash combos and reversal timing set the pace
WWE SmackDown vs. Raw 2011
Reversal timing windows reward practiced reactions
WWE SmackDown vs. Raw 2011 leans a little harder on reads, though the gap is small.
WWE 2K Battlegrounds
Human opponents add light reversal mind games
WWE SmackDown vs. Raw 2011
Versus humans, reversal baiting becomes a guessing duel
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
WWE 2K Battlegrounds
Power-ups and interactive arenas inject party chaos
WWE SmackDown vs. Raw 2011
Momentum swings and AI quirks add mild chaos
WWE SmackDown vs. Raw 2011 leans a little harder on optimization, though the gap is small.
WWE 2K Battlegrounds
Shallow systems - move knowledge helps a little
WWE SmackDown vs. Raw 2011
Move sets, match types and creation systems are learnable
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.