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 · Grand Arena
Hero shooter with team-up ability synergies.
Execution · Competitive PvP
Destruction-heavy team shooter with cashout heists.
Marvel Rivals leans Execution (Grand Arena); The Finals 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.
Marvel Rivals
Hero aim and ability timing
The Finals
Movement and aim under destruction chaos
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Marvel Rivals
Team-fight cooldown trading is prediction
The Finals
Cashout fights are three-team mind games
The Finals leans a little harder on variance, though the gap is small.
Marvel Rivals
Map and team comp roll affects
The Finals
Destruction and event modifiers shake fights
Marvel Rivals leans a little harder on optimization, though the gap is small.
Marvel Rivals
Hero synergies and team-up combos deep
The Finals
Class loadouts and gadget synergies
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.