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
Precision sniping and arena navigation through fixed, gimmick-laden levels.

Execution · Pure Mechanics
Light-gun aim speed against fixed enemy waves on Mario-themed rails.
MDK leans Execution (Practiced Mastery); Yoshi's Safari leans Execution (Pure Mechanics).
Yoshi's Safari leans a little harder on execution, though the gap is small.
MDK
Sniper-mode precision and arena dodging demand steady hands
Yoshi's Safari
Super Scope aim speed and accuracy is the entire test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
MDK
Alien enemies behave on fixed scripts
Yoshi's Safari
Enemies attack on fixed choreography
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
MDK
Levels are authored with nothing random
Yoshi's Safari
Stages play identically every run
MDK leans a little harder on optimization, though the gap is small.
MDK
Learning arena gimmicks and item use solves each level
Yoshi's Safari
Memorising boss weak points and wave order helps
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.