head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

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

Reads · Competitive PvP
Open-world survival sandbox where every dinosaur stalking you is another player.
Dead by Daylight leans Reads (Competitive PvP); The Isle leans Reads (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dead by Daylight
chase loops, skill checks, and 360 dodges
The Isle
Stamina management and pounce timing in chases
Dead by Daylight leans a little harder on reads, though the gap is small.
Dead by Daylight
killer-survivor mind games never stop adapting
The Isle
Human-controlled dinosaurs ambush and bait
The Isle leans a little harder on variance, though the gap is small.
Dead by Daylight
map, perk, and pallet RNG shapes each trial
The Isle
Open server world hides who is nearby
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 Isle
Growth stages, diets, and territory knowledge
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.