head to head
Neither is simply harder - they are hard in different places. Dead by Daylight demands more execution; The Ship: Murder Party demands more variance.

Reads · Competitive PvP
Asymmetric horror PvP where four survivors out-think one human killer.

Reads · Bluff & Deduction
Cruise passengers each hunt an assigned target while acting natural enough to avoid their own assassin.
Dead by Daylight leans Reads (Competitive PvP); The Ship: Murder Party leans Reads (Bluff & Deduction).
Dead by Daylight leans clearly harder on execution.
Dead by Daylight
chase loops, skill checks, and 360 dodges
The Ship: Murder Party
Landing kills and fleeing guards needs some dexterity.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dead by Daylight
killer-survivor mind games never stop adapting
The Ship: Murder Party
Spotting which passenger is your human hunter is psychological.
The Ship: Murder Party leans clearly harder on variance.
Dead by Daylight
map, perk, and pallet RNG shapes each trial
The Ship: Murder Party
Unknown quarry assignments and weapon luck cloud each round.
Dead by Daylight leans a little harder on optimization, though the gap is small.
Dead by Daylight
perk builds and loop routes are studied
The Ship: Murder Party
Needs management and guard patterns are learnable systems.
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.