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

Optimization · Pure Optimization
A crafting life-sim about running a workshop in a post-apocalyptic town.

Optimization · Pure Optimization
Procedural space exploration sandbox with crafting depth.
My Time at Portia leans Optimization (Pure Optimization); No Man's 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.
My Time at Portia
Light combat and crafting timing.
No Man's Sky
Light shooter and flight inputs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
My Time at Portia
NPCs follow scripts.
No Man's Sky
Mostly solo, sparse PvP
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
My Time at Portia
Loot and gifts vary.
No Man's Sky
Procedural planets and loot
No Man's Sky leans a little harder on optimization, though the gap is small.
My Time at Portia
Workshop scheduling and commissions reward optimization.
No Man's Sky
Base, freighter, expedition progression
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.