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
High-tempo brawler execution against fixed crowd choreography.

Execution · Practiced Mastery
Simon Belmont's SNES remake-quest with a multidirectional whip and a moody trek to Dracula.
Midnight Fight Express leans Execution (Pure Mechanics); Super Castlevania IV leans Execution (Practiced Mastery).
Midnight Fight Express leans a little harder on execution, though the gap is small.
Midnight Fight Express
Crowd-control timing, counters and weapon juggling carry levels
Super Castlevania IV
Eight-way whip control and stair commitment test precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Midnight Fight Express
Thugs attack on scripted cues
Super Castlevania IV
Classic scripted monster patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Midnight Fight Express
Fixed level setups every attempt
Super Castlevania IV
Hidden wall meat, fixed locations
Super Castlevania IV leans a little harder on optimization, though the gap is small.
Midnight Fight Express
Skill unlocks and route knowledge polish scores
Super Castlevania IV
Subweapon choice and boss pattern study
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.