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.

Execution · Competitive PvP
A party platform fighter testing scramble execution and couch-rival prediction.

Execution · Competitive PvP
Football stick execution and opponent reading, salted with bounce-of-the-ball luck.
Digimon Rumble Arena 2 leans Execution (Competitive PvP); FIFA Soccer 07 leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Digimon Rumble Arena 2
Smash-style movement and attack timing in chaotic arenas
FIFA Soccer 07
Stick skills and timing on passes and finishing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Digimon Rumble Arena 2
Couch opponents bait digivolutions and punishes
FIFA Soccer 07
Versus humans, baiting tackles and disguising attacks matters
FIFA Soccer 07 leans a little harder on variance, though the gap is small.
Digimon Rumble Arena 2
Item and power-up spawns shuffle fights
FIFA Soccer 07
Deflections and keeper randomness swing single matches
FIFA Soccer 07 leans a little harder on optimization, though the gap is small.
Digimon Rumble Arena 2
Character matchups and stage knowledge add light depth
FIFA Soccer 07
Formations and exploit patterns are learnable meta
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.