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.

Optimization · Pure Optimization
Instanced online RPG where deck-like eight-skill builds decide battles before they begin.

Optimization · Mind & Math
The pioneering sandbox MMORPG of player economies, housing, and open PvP.
Guild Wars leans Optimization (Pure Optimization); Ultima Online leans Optimization (Mind & Math).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Guild Wars
Interrupt timing and kiting in skirmishes
Ultima Online
PvP timing and macro dexterity matter
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Guild Wars
GvG and arena metagame against adapting humans
Ultima Online
Player killers and traders adapt to you
Ultima Online leans a little harder on variance, though the gap is small.
Guild Wars
Modest drop and spawn randomness
Ultima Online
Open-world encounters and loot uncertainty
Guild Wars leans a little harder on optimization, though the gap is small.
Guild Wars
Eight-skill build construction is the game's soul
Ultima Online
Skill builds and the player economy reward system mastery
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.