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
Rockstar's stripped-down table tennis game, all spin, placement, and rally nerve.
Mario Tennis Aces leans Execution (Competitive PvP); Rockstar Games Presents Table Tennis leans Execution (Competitive PvP).
Rockstar Games Presents Table Tennis leans a little harder on execution, though the gap is small.
Mario Tennis Aces
Shot timing, charge mechanics, footwork
Rockstar Games Presents Table Tennis
Spin placement and rally tempo demand exacting stick control
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
Rockstar Games Presents Table Tennis
Versus rallies are pure placement and spin prediction
Mario Tennis Aces leans a little harder on variance, though the gap is small.
Mario Tennis Aces
Mostly deterministic ball physics
Rockstar Games Presents Table Tennis
Fully deterministic ball physics
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Tennis Aces
Character matchups and tech routes
Rockstar Games Presents Table Tennis
Character styles and spin counters 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.