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

Execution · Practiced Mastery
Prequel chronicling Noble Team's doomed defence, with armour abilities reshaping multiplayer.

Execution · Competitive PvP
Simulation-styled WWE entry praised for its showcase mode and refined reversal-based combat.
Halo: Reach leans Execution (Practiced Mastery); WWE 2K19 leans Execution (Competitive PvP).
Halo: Reach leans a little harder on execution, though the gap is small.
Halo: Reach
DMR precision and armour-ability timing
WWE 2K19
Reversal timing windows and combo execution
WWE 2K19 leans a little harder on reads, though the gap is small.
Halo: Reach
Multiplayer rewards predicting human movement
WWE 2K19
Human versus matches hinge on counter prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Halo: Reach
Loadouts and spawns add small swings
WWE 2K19
Slight randomness in pin kick-outs and AI
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Halo: Reach
Ability matchups and map knowledge
WWE 2K19
Payback systems, move-set knowledge and MyPlayer builds
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.