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
Slapstick physics puzzler about hauling a wobbly ragdoll through dreamscapes.

Optimization · Practiced Mastery
Isometric co-op puzzling testing coordination and trap-room solutions.
Human: Fall Flat leans Optimization (Practiced Mastery); Lara Croft and the Temple of Osiris 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.
Human: Fall Flat
Wrestling floppy physics limbs is the joke
Lara Croft and the Temple of Osiris
Twin-stick aiming and trap dodging take light skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Human: Fall Flat
No adversary, only wobbly geometry
Lara Croft and the Temple of Osiris
Enemies swarm on fixed triggers
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Human: Fall Flat
Physics jank adds slapstick unpredictability
Lara Croft and the Temple of Osiris
Puzzle and trap layouts are fixed once seen
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Human: Fall Flat
Puzzle solutions and shortcut discovery
Lara Croft and the Temple of Osiris
Co-op puzzle solving and score routing lead the test
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.