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

Execution · Practiced Mastery
Zelda-meets-God-of-War action adventure starring the horseman War.

Execution · Practiced Mastery
Dodging scripted bullet patterns while solving each fight's pacifist logic.
Darksiders leans Execution (Practiced Mastery); Deltarune leans Execution (Practiced Mastery).
Darksiders leans a little harder on execution, though the gap is small.
Darksiders
combo-driven combat with dodge timing
Deltarune
Bullet-hell dodging in battles demands real reflexes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Darksiders
enemies are scripted
Deltarune
Enemy patterns are charming but fully scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Darksiders
world and bosses are fixed
Deltarune
Encounters and secrets are fixed once known
Darksiders leans a little harder on optimization, though the gap is small.
Darksiders
Zelda-style dungeons and upgrade routing
Deltarune
ACT routes, sparing logic and TP economy are 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.