head to head
vs
Marble It Up!vsMetal Slug
Marble It Up! leans Execution (Pure Mechanics); Metal Slug leans Execution (Practiced Mastery).
Marble It Up!Metal Slug
Axis by axis
Execution9 vs 8
Marble It Up! leans harder on execution: Frame-perfect marble control and boosting decide every run
Reads0 vs 0
Even - both lean on reads about the same.
Variance1 vs 1
Even - both lean on variance about the same.
Optimization5 vs 6
Metal Slug leans harder on optimization: One-credit clears come from memorising routes and spawn patterns
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.