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.

Optimization · Practiced Mastery
FPS scenarios converted into solvable sequencing puzzles by stopped time.

Optimization · Practiced Mastery
A WWII stealth game about ghosting through guard patrols as a British spy.
SuperHot leans Optimization (Practiced Mastery); Velvet Assassin leans Optimization (Practiced Mastery).
SuperHot leans a little harder on execution, though the gap is small.
SuperHot
Time-stops-when-you-stop removes most twitch pressure
Velvet Assassin
Stealth kill timing and shadow movement
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
SuperHot
Red guys follow spawn scripts, not minds
Velvet Assassin
Guards patrol on fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
SuperHot
Spawn order is unknown on a first attempt only
Velvet Assassin
Patrol layouts unknown only on first attempt
SuperHot leans a little harder on optimization, though the gap is small.
SuperHot
Each level is a solvable movement-and-kill-order puzzle
Velvet Assassin
Routes through guard patterns are the solvable core
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.