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 · Practiced Mastery
Plannable stealth routing punctuated by precise ballistic marksmanship.

Execution · Practiced Mastery
An arcade-style flight combat game of aerial dogfights and ground strikes.
Sniper Elite III leans Execution (Practiced Mastery); Tom Clancy's H.A.W.X 2 leans Execution (Practiced Mastery).
Tom Clancy's H.A.W.X 2 leans a little harder on execution, though the gap is small.
Sniper Elite III
Ballistic long shots demand steady, compensated aim
Tom Clancy's H.A.W.X 2
flight control precision under time pressure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Sniper Elite III
Enemy AI follows mappable alert and search routines
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.
Sniper Elite III
Patrol details and wind vary slightly per attempt
Tom Clancy's H.A.W.X 2
some mission event randomness
Sniper Elite III leans a little harder on optimization, though the gap is small.
Sniper Elite III
Open maps reward planned routes, sound masking and relocation
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.