head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Practiced Mastery
Open-world survival action about outrunning massive zombie hordes on a motorcycle.

Optimization · Practiced Mastery
Lara raids Siberian tombs in a stealth-action adventure heavy on puzzles.
Days Gone leans Optimization (Practiced Mastery); Rise of the Tomb Raider 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.
Days Gone
horde shooting and bike handling under pressure
Rise of the Tomb Raider
Bow aim, stealth timing, and platforming sequences.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Days Gone
freaker AI is scripted swarm logic
Rise of the Tomb Raider
Guards follow predictable patrol scripts.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Days Gone
patrols and weather shift encounters slightly
Rise of the Tomb Raider
Tomb unknowns dissolve after one visit.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Days Gone
horde routing, traps, and gear prep decide fights
Rise of the Tomb Raider
Tomb puzzles, crafting, and collectible routing are solvable.
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.