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 · Pure Mechanics
Input precision across five fixed skateboarding events with learnable optimal lines.

Execution · Practiced Mastery
Wrangling high-speed 3D movement through fixed stages and boss scripts.
Skate or Die leans Execution (Pure Mechanics); Sonic Adventure DX: Director's Cut leans Execution (Practiced Mastery).
Skate or Die leans a little harder on execution, though the gap is small.
Skate or Die
Joystick precision on ramps, jumps and races decides every event
Sonic Adventure DX: Director's Cut
High-speed 3D control and jank-wrangling demand real hands
Skate or Die leans a little harder on reads, though the gap is small.
Skate or Die
Pool joust against another human adds slight prediction
Sonic Adventure DX: Director's Cut
Chaos bosses run fixed phase scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Skate or Die
Courses are fixed; nothing hidden after a few runs
Sonic Adventure DX: Director's Cut
Stage layouts and upgrades never change
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Skate or Die
Learning each event's optimal lines and trick values raises scores
Sonic Adventure DX: Director's Cut
Speedrun routing and A-rank paths are learnable systems
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.