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.

Execution · Pure Mechanics
Arcade car control across loose surfaces, weather and door-to-door packs.

Execution · Practiced Mastery
An arcade-style flight combat game of aerial dogfights and ground strikes.
Dirt 5 leans Execution (Pure Mechanics); Tom Clancy's H.A.W.X 2 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt 5
Sliding off-road cars on mixed surfaces is the whole test
Tom Clancy's H.A.W.X 2
flight control precision under time pressure
Dirt 5 leans a little harder on reads, though the gap is small.
Dirt 5
Pack racing adds light wheel-to-wheel jockeying
Tom Clancy's H.A.W.X 2
scripted enemy squadrons, not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt 5
Dynamic weather shifts grip unpredictably
Tom Clancy's H.A.W.X 2
some mission event randomness
Tom Clancy's H.A.W.X 2 leans a little harder on optimization, though the gap is small.
Dirt 5
Car class knowledge and line choice reward study
Tom Clancy's H.A.W.X 2
loadout and maneuver routing
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.