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.

Optimization · Practiced Mastery
Scheduling and routing a fixed 72-hour clock through zombie-filled detours.

Optimization · Practiced Mastery
A dungeon-crawler spin-off testing build management across randomised otherworlds.
Dead Rising 2 leans Optimization (Practiced Mastery); Silent Hill: Book of Memories leans Optimization (Practiced Mastery).
Dead Rising 2 leans a little harder on execution, though the gap is small.
Dead Rising 2
Crowd-clearing combat needs competence, not twitch mastery
Silent Hill: Book of Memories
Twin-stick melee and dodge timing matter moderately
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Rising 2
Zombies and psychopaths follow fixed behaviour
Silent Hill: Book of Memories
Monsters follow simple scripted aggression
Silent Hill: Book of Memories leans a little harder on variance, though the gap is small.
Dead Rising 2
Survivor events are scripted-but-unknown on first runs
Silent Hill: Book of Memories
Procedural dungeon layouts and loot rolls vary each run
Dead Rising 2 leans a little harder on optimization, though the gap is small.
Dead Rising 2
The 72-hour clock makes scheduling and routing the real game
Silent Hill: Book of Memories
Karma builds, weapon upkeep and puzzle rooms reward system mastery
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.