head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Competitive PvP
A test of precise inputs and constant human prediction across a fixed roster of matchup puzzles.

Execution · Competitive PvP
The definitive classic Street Fighter II revision and a founding tournament fighter.
Street Fighter II: The World Warrior leans Execution (Competitive PvP); Super Street Fighter II Turbo 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.
Street Fighter II: The World Warrior
Frame-precise inputs and combo timing define every matchup
Super Street Fighter II Turbo
One-frame links, charge timing, and strict motions
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Street Fighter II: The World Warrior
Predicting human opponent's next move is constant and non-convergent
Super Street Fighter II Turbo
Footsies and throw mixups against an adapting human
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Street Fighter II: The World Warrior
No meaningful RNG; match outcomes are skill-determined
Super Street Fighter II Turbo
Minor damage variation; everything else visible
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Street Fighter II: The World Warrior
Character matchups and punish routes are learnable but not fully solvable
Super Street Fighter II Turbo
Matchup knowledge and super meter spend are studied lines
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.