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

Execution · Competitive PvP
Hardcore Eastern Front shooter where exposure for seconds means death.

Execution · Competitive PvP
Turn-based artillery comedy where teams of worms annihilate each other.
Red Orchestra 2: Heroes of Stalingrad leans Execution (Competitive PvP); Worms 2 leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Red Orchestra 2: Heroes of Stalingrad
Realistic ballistics and one-shot kills demand precise aim.
Worms 2
Ninja rope mastery and pixel-perfect grenade arcs win games.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Red Orchestra 2: Heroes of Stalingrad
Anticipating human teams' pushes and covered angles.
Worms 2
Human opponents bait positions and hide intentions.
Worms 2 leans a little harder on variance, though the gap is small.
Red Orchestra 2: Heroes of Stalingrad
Suppression, concealment, and unseen shooters.
Worms 2
Wind, crate drops and terrain randomness swing turns.
Worms 2 leans a little harder on optimization, though the gap is small.
Red Orchestra 2: Heroes of Stalingrad
Map chokepoints and role mechanics reward study.
Worms 2
Weapon economy and positioning theory are studyable.
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.