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
Arena fighting where builds and combo execution meet light PvP prediction.

Execution · Competitive PvP
Stick-skill football execution with opponent prediction in versus play.
Dragon Ball: Xenoverse 2 leans Execution (Practiced Mastery); UEFA Euro 2008 leans Execution (Competitive PvP).
UEFA Euro 2008 leans a little harder on execution, though the gap is small.
Dragon Ball: Xenoverse 2
Combo strings and vanish timing need moderate hands
UEFA Euro 2008
Pass timing, dribbling and finishing decide matches
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball: Xenoverse 2
PvP opponents bait supers and punish habits
UEFA Euro 2008
Versus humans, baiting tackles and disguising attacks matters
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball: Xenoverse 2
QQ Bang crafting and drop rates randomise builds
UEFA Euro 2008
Bounces and deflections add football's usual noise
Dragon Ball: Xenoverse 2 leans a little harder on optimization, though the gap is small.
Dragon Ball: Xenoverse 2
Build stats and skill loadouts shape every matchup
UEFA Euro 2008
Formations and squad selection sit underneath
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.