head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Practiced Mastery
A short promotional sidescroller testing basic 2D aim and platforming.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Codename: Gordon leans Execution (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Codename: Gordon
2D mouse-aimed shooting and platforming carry the short campaign
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Red Dead Redemption 2 leans a little harder on reads, though the gap is small.
Codename: Gordon
Combine soldiers run simple fixed AI
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Red Dead Redemption 2 leans a little harder on variance, though the gap is small.
Codename: Gordon
Levels are short, scripted and static
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Red Dead Redemption 2 leans a little harder on optimization, though the gap is small.
Codename: Gordon
Little to solve beyond basic ammo and route awareness
Red Dead Redemption 2
Loadouts and routes solvable but loose.
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.