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 · Pure Mechanics
A 3D platformer whose joy lives in tight movement and capture-driven traversal.

Execution · Pure Mechanics
Tetris with a puzzle mode - still a test of placement speed and stacking craft.
Super Mario Odyssey leans Execution (Pure Mechanics); Tetris Plus leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Super Mario Odyssey
Precise platforming and capture-move tech ceiling.
Tetris Plus
Piece placement speed under pressure decides everything
Tetris Plus leans a little harder on reads, though the gap is small.
Super Mario Odyssey
No adaptive opponents whatsoever.
Tetris Plus
Versus mode adds only light opponent awareness
Tetris Plus leans a little harder on variance, though the gap is small.
Super Mario Odyssey
Almost no randomness in level design.
Tetris Plus
Random piece order is bounded and rapidly mappable
Super Mario Odyssey leans a little harder on optimization, though the gap is small.
Super Mario Odyssey
Moon routes and movement tech learnable.
Tetris Plus
Puzzle-mode professor routes have known optimal solutions
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.