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
A DS first-person shooter pairing a Metroid campaign with surprisingly competitive online deathmatch.

Execution · Pure Mechanics
Momentum-perfect platform racing spiced with item mind games against humans.
Metroid Prime Hunters leans Execution (Practiced Mastery); SpeedRunners leans Execution (Pure Mechanics).
SpeedRunners leans a little harder on execution, though the gap is small.
Metroid Prime Hunters
Stylus aiming on DS is a real physical ceiling
SpeedRunners
Grapple swings and boost timing at full speed decide races
SpeedRunners leans a little harder on reads, though the gap is small.
Metroid Prime Hunters
Online deathmatch rewards out-predicting human hunters
SpeedRunners
Timing item throws against human racers' habits wins exchanges
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid Prime Hunters
Maps and pickups are fixed
SpeedRunners
Item pickups add party-game chaos
Metroid Prime Hunters leans a little harder on optimization, though the gap is small.
Metroid Prime Hunters
Hunter matchups, map control, and pickup timing
SpeedRunners
Optimal racing lines per track are learnable
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.