head to head
Neither is simply harder - they are hard in different places. Grand Theft Auto V demands more reads; Remember Me demands more optimization.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.

Optimization · Practiced Mastery
Neo-Paris brawler whose hook is building your own combos and remixing victims' memories.
Grand Theft Auto V leans Execution (Practiced Mastery); Remember Me leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Remember Me
Combo chains need rhythm but stay forgiving
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Remember Me
Leapers and enforcers follow fixed behaviors
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Remember Me
Memory remixes are scripted puzzles, not random
Remember Me leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Remember Me
Pressen combo-lab design is the game's real system
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.