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

Execution · Pure Mechanics
An NES run-and-gun testing reflex dodging through memorised enemy gauntlets.

Execution · Pure Mechanics
A demanding return to classic Crash platforming.
Contra Force leans Execution (Pure Mechanics); Crash Bandicoot 4: It's About Time leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Contra Force
Run-and-gun dodging through bullet-heavy NES stages
Crash Bandicoot 4: It's About Time
Brutal platforming with precise crate timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Contra Force
Terrorist enemies spawn on fixed scripts
Crash Bandicoot 4: It's About Time
Scripted bosses
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Contra Force
Stage layouts never change
Crash Bandicoot 4: It's About Time
Deterministic levels
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Contra Force
Character selection and power-up routing help modestly
Crash Bandicoot 4: It's About Time
N. Verted and flashback routing
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.