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 · Practiced Mastery
A BioWare RPG testing build choices and style counters over reflexes.

Optimization · Pure Optimization
A scripted RPG where pattern-learning and pacifist routing carry you.
Jade Empire: Special Edition leans Optimization (Practiced Mastery); Undertale 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.
Jade Empire: Special Edition
Martial-arts combat is real-time but forgiving
Undertale
Bullet-hell dodging in scripted patterns
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Jade Empire: Special Edition
Enemies cycle fixed styles without modelling you
Undertale
NPCs follow fixed dialogue trees, not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Jade Empire: Special Edition
Story branches are choices, not hidden randomness
Undertale
Minimal randomness in encounters
Undertale leans a little harder on optimization, though the gap is small.
Jade Empire: Special Edition
Style counters, stat builds and dialogue paths are solvable
Undertale
Learning fixed boss patterns and mercy routes wins
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.