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 · Practiced Mastery
The Genesis Castlevania tours war-torn Europe with whip-wielding John Morris and spear-vaulting Eric Lecarde.

Execution · Pure Mechanics
High-tempo brawler execution against fixed crowd choreography.
Castlevania: Bloodlines leans Execution (Practiced Mastery); Midnight Fight Express leans Execution (Pure Mechanics).
Midnight Fight Express leans a little harder on execution, though the gap is small.
Castlevania: Bloodlines
Stiff classic movement against demanding Genesis bosses
Midnight Fight Express
Crowd-control timing, counters and weapon juggling carry levels
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania: Bloodlines
Scripted monsters throughout
Midnight Fight Express
Thugs attack on scripted cues
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania: Bloodlines
Minor hidden items only
Midnight Fight Express
Fixed level setups every attempt
Castlevania: Bloodlines leans a little harder on optimization, though the gap is small.
Castlevania: Bloodlines
Character choice changes paths; patterns are learnable
Midnight Fight Express
Skill unlocks and route knowledge polish scores
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.