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
Double Fine's tower-defense shooter where you fight TV monsters from a customizable trench-mech.

Optimization · Practiced Mastery
FPS scenarios converted into solvable sequencing puzzles by stopped time.
Iron Brigade leans Optimization (Practiced Mastery); SuperHot 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.
Iron Brigade
Manual aiming from your walking trench-mech
SuperHot
Time-stops-when-you-stop removes most twitch pressure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Iron Brigade
Tube waves arrive on schedule
SuperHot
Red guys follow spawn scripts, not minds
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Iron Brigade
Loot drops randomize gear options
SuperHot
Spawn order is unknown on a first attempt only
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Iron Brigade
Turret placement and mech loadout economy
SuperHot
Each level is a solvable movement-and-kill-order puzzle
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.