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 · Practiced Mastery
Combo execution through scripted Outworld brawls, alone or in co-op.

Execution · Practiced Mastery
A movie tie-in testing combo timing against scripted duels.
Mortal Kombat: Shaolin Monks leans Execution (Practiced Mastery); Star Wars: Episode III - Revenge of the Sith leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mortal Kombat: Shaolin Monks
Combo juggling and launcher timing carry combat
Star Wars: Episode III - Revenge of the Sith
Lightsaber combos and blocks need modest timing
Star Wars: Episode III - Revenge of the Sith leans a little harder on reads, though the gap is small.
Mortal Kombat: Shaolin Monks
Bosses telegraph fixed Outworld patterns
Star Wars: Episode III - Revenge of the Sith
Versus duel mode adds light human prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mortal Kombat: Shaolin Monks
Encounters repeat identically once learned
Star Wars: Episode III - Revenge of the Sith
Encounters are fixed movie-scripted setpieces
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mortal Kombat: Shaolin Monks
Move unlocks, co-op synergies and boss patterns reward study
Star Wars: Episode III - Revenge of the Sith
Combo unlocks and boss patterns are quickly mapped
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.
full breakdown
Mortal Kombat: Shaolin Monks →
full breakdown
Star Wars: Episode III - Revenge of the Sith →