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
Slow-motion gunfights against aggressive but ultimately mappable squad AI.

Execution · Pure Mechanics
Era-typical scripted WWII shooting galleries testing aim and placement memory.
F.E.A.R. 3 leans Execution (Practiced Mastery); Medal of Honor: Rising Sun leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
F.E.A.R. 3
Slow-mo gunplay still rewards fast accurate aim
Medal of Honor: Rising Sun
Aim against scripted soldier placements is the core demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
F.E.A.R. 3
Squad AI flanks convincingly but follows mappable routines
Medal of Honor: Rising Sun
Multiplayer adds light human prediction; campaign AI is static
F.E.A.R. 3 leans a little harder on variance, though the gap is small.
F.E.A.R. 3
Encounter layouts are scripted-but-unknown first time
Medal of Honor: Rising Sun
Setpiece missions replay identically
F.E.A.R. 3 leans a little harder on optimization, though the gap is small.
F.E.A.R. 3
Cover usage and power timing are quickly learned
Medal of Honor: Rising Sun
Memorising enemy placements and routes is shallow but present
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.