head to head
vs
Metal Slug 2vsThe World's Hardest Game
Metal Slug 2 leans Execution (Practiced Mastery); The World's Hardest Game leans Execution (Pure Mechanics).
Metal Slug 2The World's Hardest Game
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 0
Metal Slug 2 leans harder on variance: Spawns are deterministic; nothing hidden after one credit
Optimization6 vs 5
Metal Slug 2 leans harder on optimization: One-credit clears come from memorising every spawn and pattern
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.