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
An action adventure rewarding combat timing against scripted boss patterns.

Optimization · Practiced Mastery
An action-command RPG where dodging and countering boss tells is half the battle.
God of War Ragnarok leans Execution (Practiced Mastery); Mario & Luigi: Bowser's Inside Story leans Optimization (Practiced Mastery).
God of War Ragnarok leans a little harder on execution, though the gap is small.
God of War Ragnarok
Parry timing and combo execution in combat
Mario & Luigi: Bowser's Inside Story
Every attack and dodge is a timed action command.
God of War Ragnarok leans a little harder on reads, though the gap is small.
God of War Ragnarok
Bosses use fixed movesets
Mario & Luigi: Bowser's Inside Story
Boss tells are fixed and learnable.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
God of War Ragnarok
Negligible randomness
Mario & Luigi: Bowser's Inside Story
Little randomness beyond minor drops.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
God of War Ragnarok
Build choices and moveset mastery solve bosses
Mario & Luigi: Bowser's Inside Story
Badges, gear, and learning attack patterns close fights.
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.