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 light-gun rail shooter testing reflexes and precise aim against dinosaurs.

Execution · Pure Mechanics
An arcade test of jump timing and enemy-flipping precision on a single screen.
Dino Stalker leans Execution (Pure Mechanics); Mario Bros. leans Execution (Pure Mechanics).
Dino Stalker leans a little harder on execution, though the gap is small.
Dino Stalker
Light-gun aim and fast reactions decide survival
Mario Bros.
Precise jumps and bump timing under crowding enemies decide survival
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dino Stalker
Dinosaurs charge on fixed scripts, nothing to predict
Mario Bros.
Versus mode adds light human interference, enemies are scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dino Stalker
Spawn timing adds modest unpredictability
Mario Bros.
Enemy spawns vary slightly but patterns are quickly learned
Mario Bros. leans a little harder on optimization, though the gap is small.
Dino Stalker
Ammo and weapon management are light secondary concerns
Mario Bros.
POW block usage and enemy routing have known best 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.