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 black-sheep sequel whose passive enemies and dominant guns sand the series' skill ceiling way down.

Execution · Practiced Mastery
Loose action execution and horde-building through scripted comedy set-pieces.
Devil May Cry 2 leans Execution (Practiced Mastery); Stubbs the Zombie in Rebel Without a Pulse leans Execution (Practiced Mastery).
Devil May Cry 2 leans a little harder on execution, though the gap is small.
Devil May Cry 2
Infamously easy; guns trivialize most encounters
Stubbs the Zombie in Rebel Without a Pulse
Limb-throwing and horde wrangling need only loose aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Devil May Cry 2
Passive enemy AI never pressures, let alone adapts
Stubbs the Zombie in Rebel Without a Pulse
Townsfolk and soldiers follow scripted AI
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Devil May Cry 2
Flat authored levels hide little
Stubbs the Zombie in Rebel Without a Pulse
Encounters are fixed set-pieces
Devil May Cry 2 leans a little harder on optimization, though the gap is small.
Devil May Cry 2
Amulet builds and boss patterns fall fast
Stubbs the Zombie in Rebel Without a Pulse
Conversion economy - building your horde - rewards light planning
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.