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 · Competitive PvP
Fast mech duels testing piloting execution and prediction of human opponents.

Execution · Pure Mechanics
Classic WWII shooter whose objective-based multiplayer defined a genre.
Mecha Break leans Execution (Competitive PvP); Return to Castle Wolfenstein leans Execution (Pure Mechanics).
Return to Castle Wolfenstein leans a little harder on execution, though the gap is small.
Mecha Break
Boost management and aim in fast mech duels demand dexterity
Return to Castle Wolfenstein
Fast strafing and precise hitscan aim dominate duels
Mecha Break leans a little harder on reads, though the gap is small.
Mecha Break
Human pilots adapt positioning and engage timing constantly
Return to Castle Wolfenstein
Multiplayer objective pushes hinge on outguessing human defense
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mecha Break
Match conditions are mostly fixed beyond extraction-mode loot
Return to Castle Wolfenstein
Fixed objectives and scripted singleplayer enemies, little randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mecha Break
Mech loadouts and role matchups reward roster knowledge
Return to Castle Wolfenstein
Objective timings, class roles, and routes reward planning
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.