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
An arena fighter mixing combo execution, build grinding and human prediction online.

Execution · Practiced Mastery
Tests arcade grapple timing with shallow systems underneath.
Dragon Ball: Xenoverse leans Execution (Practiced Mastery); WCW Nitro leans Execution (Practiced Mastery).
Dragon Ball: Xenoverse leans a little harder on execution, though the gap is small.
Dragon Ball: Xenoverse
3D arena combos, vanishes and ki management need practiced hands
WCW Nitro
Fast grapple timing in an arcade-paced wrestling frame
Dragon Ball: Xenoverse leans a little harder on reads, though the gap is small.
Dragon Ball: Xenoverse
Online PvP rewards predicting human mixups; PvE is scripted
WCW Nitro
Human versus play rewards mild move prediction
Dragon Ball: Xenoverse leans a little harder on variance, though the gap is small.
Dragon Ball: Xenoverse
Skill drops from missions roll randomly
WCW Nitro
Little randomness beyond AI behaviour
Dragon Ball: Xenoverse leans a little harder on optimization, though the gap is small.
Dragon Ball: Xenoverse
Build crafting and attribute allocation shape PvP viability
WCW Nitro
Learning each wrestler's move list is quickly exhausted
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.