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 · Competitive PvP
Chaotic asymmetric rounds testing aim, facility knowledge and reading untrustworthy humans.

Execution · Competitive PvP
Artillery touch, human prediction and weapon economy in destructible 3D terrain.
SCP: Secret Laboratory leans Execution (Competitive PvP); Worms 3D leans Execution (Competitive PvP).
SCP: Secret Laboratory leans a little harder on execution, though the gap is small.
SCP: Secret Laboratory
Gunfights and SCP chases demand aim and movement
Worms 3D
Judging grenade arcs and wind in 3D takes real touch
SCP: Secret Laboratory leans a little harder on reads, though the gap is small.
SCP: Secret Laboratory
Human teams bluff, betray and negotiate constantly
Worms 3D
Predicting where a human hides and strikes next matters
SCP: Secret Laboratory leans a little harder on variance, though the gap is small.
SCP: Secret Laboratory
Random spawns, items and facility layout each round
Worms 3D
Wind, crate drops and terrain chaos swing turns
Worms 3D leans a little harder on optimization, though the gap is small.
SCP: Secret Laboratory
Class knowledge, keycard routes and zone control reward mastery
Worms 3D
Weapon economy and positioning math reward 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.