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.

Execution · Competitive PvP
A 2D anime fighter testing combo execution and team-assist planning.

Execution · Competitive PvP
The toned-down crossover fighter matching Mortal Kombat's roster against DC superheroes.
Dragon Ball Z: Extreme Butouden leans Execution (Competitive PvP); Mortal Kombat vs. DC Universe leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball Z: Extreme Butouden
2D combo strings and assist timing demand quick hands
Mortal Kombat vs. DC Universe
Juggle combos and klose kombat timing
Mortal Kombat vs. DC Universe leans a little harder on reads, though the gap is small.
Dragon Ball Z: Extreme Butouden
Human versus play rewards predicting habits; AI is scripted
Mortal Kombat vs. DC Universe
Human mixups, though a simpler toolset than peers
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball Z: Extreme Butouden
Deterministic systems leave little to chance
Mortal Kombat vs. DC Universe
Deterministic crossover combat
Mortal Kombat vs. DC Universe leans a little harder on optimization, though the gap is small.
Dragon Ball Z: Extreme Butouden
Team composition and assist synergy form the strategy layer
Mortal Kombat vs. DC Universe
Mapping juggle routes and matchup tools rewards practice
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.