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.

Optimization · Practiced Mastery
An isometric action RPG narrated as you play.

Execution · Practiced Mastery
Open-world western about an outlaw forced to hunt down his old gang.
Bastion leans Optimization (Practiced Mastery); Red Dead Redemption 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.
Bastion
Action combat needs timing and aim.
Red Dead Redemption
Dead Eye softens but gunplay still wants aim
Red Dead Redemption leans a little harder on reads, though the gap is small.
Bastion
Enemies are scripted.
Red Dead Redemption
Multiplayer skirmishes add light human prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Bastion
Minor loot variance.
Red Dead Redemption
Ambient events and spawns vary mildly
Bastion leans a little harder on optimization, though the gap is small.
Bastion
Weapon and idol builds reward planning.
Red Dead Redemption
Mission approaches and economy are learnable
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.