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

Optimization · Pure Optimization
A story-first adventure with gentle item-puzzle logic as its only test.

Optimization · Pure Optimization
Cyberpunk point-and-click adventure through a dystopian Australian mega-city.
Back to the Future: The Game leans Optimization (Pure Optimization); Beneath a Steel Sky leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Back to the Future: The Game
Telltale point-and-click, zero dexterity
Beneath a Steel Sky
Point-and-click; no dexterity required
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Back to the Future: The Game
Characters follow the episodic script
Beneath a Steel Sky
No opponent; scripted characters
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Back to the Future: The Game
Puzzle solutions are hidden until found
Beneath a Steel Sky
First-run puzzle surprises only
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Back to the Future: The Game
Light item-logic puzzles drive each episode
Beneath a Steel Sky
Inventory puzzle chains are fully solvable
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.