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

Optimization · Practiced Mastery
Zelda-flavored musou about juggling battlefield objectives while mowing hordes.

Optimization · Practiced Mastery
Routing guard patrols and executing clean stealth kills through fixed missions.
Hyrule Warriors leans Optimization (Practiced Mastery); Tenchu Z leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Hyrule Warriors
Combo strings and weak-point gauge timing
Tenchu Z
Stealth-kill timing and movement control matter but forgive
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Hyrule Warriors
Enemy hordes are mindless and scripted
Tenchu Z
Guard patrols are scripted, mappable routes
Tenchu Z leans a little harder on variance, though the gap is small.
Hyrule Warriors
Minor drop and mission randomness
Tenchu Z
Patrol routes are unknown only on first attempts
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Hyrule Warriors
Keep management, character builds, and map priorities
Tenchu Z
Routing each mission for undetected kills is the real game
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.