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
A classic beat 'em up sequel where the Lee brothers avenge Marian with kicks and knees.

Execution · Practiced Mastery
Memorising scripted boxer patterns and executing split-second counters.
Double Dragon II: The Revenge leans Execution (Practiced Mastery); Super Punch-Out!! leans Execution (Practiced Mastery).
Super Punch-Out!! leans a little harder on execution, though the gap is small.
Double Dragon II: The Revenge
Directional attacks and knee timing carry every fight
Super Punch-Out!!
Frame-tight dodges and counters decide every bout
Super Punch-Out!! leans a little harder on reads, though the gap is small.
Double Dragon II: The Revenge
Enemy thugs use fixed AI routines
Super Punch-Out!!
Opponents are scripted pattern puzzles, not adapting minds
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Double Dragon II: The Revenge
Minor enemy positioning randomness
Super Punch-Out!!
Patterns are fixed once learned - nothing random
Super Punch-Out!! leans a little harder on optimization, though the gap is small.
Double Dragon II: The Revenge
Learning stage layouts and abusing the hyper knee
Super Punch-Out!!
Memorising each boxer's tells and optimal counters is the game
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.