head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Optimization · Practiced Mastery
Active dodge-heavy combat with a deep build system, tested against both scripted content and human opponents.

Execution · Practiced Mastery
A college football simulation game with arcade-style gameplay.
Guild Wars 2 leans Optimization (Practiced Mastery); NCAA Gamebreaker 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.
Guild Wars 2
Dodge timing and active combat define moment-to-moment play
NCAA Gamebreaker
play execution and timing on the field matters
Guild Wars 2 leans a little harder on reads, though the gap is small.
Guild Wars 2
WvW and structured PvP feature real adaptive opponents
NCAA Gamebreaker
opposing plays can be partially predicted/countered
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Guild Wars 2
Loot RNG is present but secondary to skill expression
NCAA Gamebreaker
play calls and randomized outcomes affect plays
Guild Wars 2 leans a little harder on optimization, though the gap is small.
Guild Wars 2
Build crafting and rotation theory-crafting reward deep analysis
NCAA Gamebreaker
playbook knowledge and roster management 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.