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 · Competitive PvP
Arcade tennis with timing-based PvP mind games.

Execution · Competitive PvP
A fast-paced online football game emphasizing mechanical ball control and outplaying opposing players.
Mario Tennis Aces leans Execution (Competitive PvP); Rematch leans Execution (Competitive PvP).
Rematch leans a little harder on execution, though the gap is small.
Mario Tennis Aces
Shot timing, charge mechanics, footwork
Rematch
tight ball control, shooting, and movement skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Tennis Aces
Online tennis demands reading opponent placement
Rematch
reading human opponents' positioning and passing lanes
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Tennis Aces
Mostly deterministic ball physics
Rematch
ball physics bounces add minor unpredictability
Rematch leans a little harder on optimization, though the gap is small.
Mario Tennis Aces
Character matchups and tech routes
Rematch
team formations and tactics 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.