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
Sandbox crime playground spanning shooting, driving, and a persistent online economy.

Execution · Practiced Mastery
Open-world demolition testing combat execution and creative structural destruction planning.
Grand Theft Auto V leans Execution (Practiced Mastery); Red Faction: Guerrilla Re-Mars-tered leans Execution (Practiced Mastery).
Red Faction: Guerrilla Re-Mars-tered leans a little harder on execution, though the gap is small.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Red Faction: Guerrilla Re-Mars-tered
Hammer swings, driving and firefights under EDF pressure need hands
Grand Theft Auto V leans a little harder on reads, though the gap is small.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Red Faction: Guerrilla Re-Mars-tered
EDF response is scripted escalation, not adaptation
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Red Faction: Guerrilla Re-Mars-tered
Open world is fixed once explored
Red Faction: Guerrilla Re-Mars-tered leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Red Faction: Guerrilla Re-Mars-tered
Choosing demolition approaches and upgrade routes rewards 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.