head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Execution · Pure Mechanics
A button-mashing arcade sports game featuring track and field events.

Execution · Pure Mechanics
A brutal minimalist platformer where flipping gravity replaces jumping.
Track & Field II leans Execution (Pure Mechanics); VVVVVV 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.
Track & Field II
Button-mashing speed and timing define every event.
VVVVVV
Pixel-perfect gravity flips through spike gauntlets
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Track & Field II
No opponent to out-predict, purely solo performance.
VVVVVV
No opponent
Track & Field II leans a little harder on variance, though the gap is small.
Track & Field II
Minimal randomness in event outcomes.
VVVVVV
Every hazard is fixed and visible
VVVVVV leans a little harder on optimization, though the gap is small.
Track & Field II
Little strategy beyond raw execution speed.
VVVVVV
Routes are short and obvious; execution is everything
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.