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 immersive-sim shooter where combining plasmids and weapons into optimal builds is the deep layer.

Execution · Practiced Mastery
Open-world western about an outlaw forced to hunt down his old gang.
BioShock Remastered 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.
BioShock Remastered
aim and plasmid timing matter
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.
BioShock Remastered
splicers are scripted, no adaptation
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.
BioShock Remastered
loot and enemy spawns vary
Red Dead Redemption
Ambient events and spawns vary mildly
BioShock Remastered leans a little harder on optimization, though the gap is small.
BioShock Remastered
plasmid and build synergies are solvable
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.