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
An arcade test of jump timing and enemy-flipping precision on a single screen.

Execution · Pure Mechanics
A top-down run-and-gun about aiming and dodging through scripted battlefields.
Mario Bros. leans Execution (Pure Mechanics); Shock Troopers: 2nd Squad leans Execution (Pure Mechanics).
Shock Troopers: 2nd Squad leans a little harder on execution, though the gap is small.
Mario Bros.
Precise jumps and bump timing under crowding enemies decide survival
Shock Troopers: 2nd Squad
Aiming, dodging, and movement decide top-down combat
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Bros.
Versus mode adds light human interference, enemies are scripted
Shock Troopers: 2nd Squad
Enemies follow fixed scripted patterns
Shock Troopers: 2nd Squad leans a little harder on variance, though the gap is small.
Mario Bros.
Enemy spawns vary slightly but patterns are quickly learned
Shock Troopers: 2nd Squad
Enemy spawn placement adds momentary surprise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Bros.
POW block usage and enemy routing have known best lines
Shock Troopers: 2nd Squad
Weapon use and route memorization reward planning
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.