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
A shared-world looter shooter mixing sharp FPS execution with an RNG loot treadmill and solvable raid puzzles.

Optimization · Practiced Mastery
Active dodge-heavy combat with a deep build system, tested against both scripted content and human opponents.
Destiny leans Execution (Practiced Mastery); Guild Wars 2 leans Optimization (Practiced Mastery).
Destiny leans a little harder on execution, though the gap is small.
Destiny
FPS gunplay and raid mechanics demand real aim.
Guild Wars 2
Dodge timing and active combat define moment-to-moment play
Guild Wars 2 leans a little harder on reads, though the gap is small.
Destiny
Crucible PvP adds genuine human prediction.
Guild Wars 2
WvW and structured PvP feature real adaptive opponents
Destiny leans a little harder on variance, though the gap is small.
Destiny
RNG loot drops famously gate progression.
Guild Wars 2
Loot RNG is present but secondary to skill expression
Guild Wars 2 leans a little harder on optimization, though the gap is small.
Destiny
Loadout meta and raid routes are solvable systems.
Guild Wars 2
Build crafting and rotation theory-crafting reward deep analysis
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.