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 · Practiced Mastery
The console FPS landmark that introduced Master Chief and the ring world.

Execution · Practiced Mastery
A football simulation series competing with Madden in the 90s.
Halo: Combat Evolved leans Execution (Practiced Mastery); NFL GameDay leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Halo: Combat Evolved
Aim, grenade timing, and vehicle control
NFL GameDay
player control and timing on plays matters
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Halo: Combat Evolved
Multiplayer duels reward reading humans
NFL GameDay
AI defense has limited adaptive counterplay
NFL GameDay leans a little harder on variance, though the gap is small.
Halo: Combat Evolved
Covenant AI varies tactics slightly
NFL GameDay
play outcomes involve randomized elements
NFL GameDay leans a little harder on optimization, though the gap is small.
Halo: Combat Evolved
Weapon sandbox knowledge and encounter routing
NFL GameDay
playbook and roster strategy are solvable
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.