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
Arcade run-and-gun whose one-credit clears demand total spawn memorization and twitch.

Execution · Pure Mechanics
A bullet-grazing shoot-em-up about leveling by skimming enemy fire as closely as possible.
Metal Slug 3 leans Execution (Pure Mechanics); Psyvariar Delta 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.
Metal Slug 3
one-hit deaths demand frame-level dodging and aim
Psyvariar Delta
Grazing bullets at the edge of death defines mastery
Psyvariar Delta leans a little harder on reads, though the gap is small.
Metal Slug 3
every enemy wave is scripted
Psyvariar Delta
Enemy fire is scripted, not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Slug 3
branching paths vary runs slightly
Psyvariar Delta
Patterns are fixed and memorizable
Metal Slug 3 leans a little harder on optimization, though the gap is small.
Metal Slug 3
memorizing spawns is the path to a one-credit clear
Psyvariar Delta
Buzz-chaining routes and leveling strategy 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.