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
A rail shooter testing pointer accuracy against fully memorisable enemy scripts.

Execution · Practiced Mastery
Sequel platformer that swaps genres per level but always tests the hands.
Blue Estate leans Execution (Pure Mechanics); Earthworm Jim 2 leans Execution (Practiced Mastery).
Blue Estate leans a little harder on execution, though the gap is small.
Blue Estate
Aim accuracy under on-rails time pressure is the entire test
Earthworm Jim 2
Varied set-piece levels demand precise control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Blue Estate
Enemies pop up on fixed scripts, never adapting
Earthworm Jim 2
No adaptive opposition
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Blue Estate
Spawn sequences are identical every run
Earthworm Jim 2
Deterministic levels and gimmicks
Earthworm Jim 2 leans a little harder on optimization, though the gap is small.
Blue Estate
Memorising spawn order and scoring multipliers raises grades
Earthworm Jim 2
Learning each surreal level's fixed solution
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.