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 · Practiced Mastery
Prequel chronicling Noble Team's doomed defence, with armour abilities reshaping multiplayer.

Execution · Practiced Mastery
Planning approaches with recon tools, then executing them under lethal fire.
Halo: Reach leans Execution (Practiced Mastery); Tom Clancy's Ghost Recon Advanced Warfighter leans Execution (Practiced Mastery).
Halo: Reach leans a little harder on execution, though the gap is small.
Halo: Reach
DMR precision and armour-ability timing
Tom Clancy's Ghost Recon Advanced Warfighter
Lethal firefights punish sloppy aim and exposure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Halo: Reach
Multiplayer rewards predicting human movement
Tom Clancy's Ghost Recon Advanced Warfighter
Multiplayer squads outflank and adapt to your habits
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Halo: Reach
Loadouts and spawns add small swings
Tom Clancy's Ghost Recon Advanced Warfighter
Enemy placements are scripted-but-unknown on first attempt
Tom Clancy's Ghost Recon Advanced Warfighter leans a little harder on optimization, though the gap is small.
Halo: Reach
Ability matchups and map knowledge
Tom Clancy's Ghost Recon Advanced Warfighter
Drone recon, squad orders and approach planning decide missions
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.