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
Futuristic large-scale Battlefield where teams besiege flying Titan carriers.

Execution · Pure Mechanics
Classic WWII shooter whose objective-based multiplayer defined a genre.
Battlefield 2142 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.
Battlefield 2142
Gunplay, piloting, and Titan boarding need solid mechanics
Return to Castle Wolfenstein
Fast strafing and precise hitscan aim dominate duels
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield 2142
64-player human teams shift fronts and Titan assaults
Return to Castle Wolfenstein
Multiplayer objective pushes hinge on outguessing human defense
Battlefield 2142 leans a little harder on variance, though the gap is small.
Battlefield 2142
Large maps hide flanks; battle chaos obscures information
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.
Battlefield 2142
Unlock paths, squad roles, and Titan strategy reward planning
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.