head to head
vs
Metal SlugvsNex Machina
Metal Slug leans Execution (Practiced Mastery); Nex Machina leans Execution (Practiced Mastery).
Metal SlugNex Machina
Axis by axis
Execution8 vs 8
Even - both lean on execution about the same.
Reads0 vs 0
Even - both lean on reads about the same.
Variance1 vs 2
Nex Machina leans harder on variance: Enemy arrangement has minor randomisation between waves
Optimization6 vs 6
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.