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
N64 spy FPS famed for gadget-heavy missions and bot-filled multiplayer.

Execution · Practiced Mastery
Planning approaches with recon tools, then executing them under lethal fire.
Perfect Dark leans Execution (Practiced Mastery); Tom Clancy's Ghost Recon Advanced Warfighter leans Execution (Practiced Mastery).
Perfect Dark leans a little harder on execution, though the gap is small.
Perfect Dark
N64 manual aim and tight mission play
Tom Clancy's Ghost Recon Advanced Warfighter
Lethal firefights punish sloppy aim and exposure
Tom Clancy's Ghost Recon Advanced Warfighter leans a little harder on reads, though the gap is small.
Perfect Dark
Multiplayer and clever sims add some human-style adaptation
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.
Perfect Dark
Mission scripting fixed once learned
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.
Perfect Dark
Objective routing on harder difficulty tiers
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.