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

Execution · Competitive PvP
Gunplay and predicting human squads across large-scale and extraction modes.

Execution · Competitive PvP
Hardcore team shooter where one bullet kills and the HUD tells you nothing.
Delta Force leans Execution (Competitive PvP); Insurgency 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.
Delta Force
Gunfights and recoil control decide most engagements
Insurgency
One-shot lethality rewards precise aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Delta Force
Predicting human rotations and pushes runs through every mode
Insurgency
Human squads flank and adapt each round
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Delta Force
Extraction loot and operator gadget chaos add noise
Insurgency
No killcam or HUD hides enemy positions
Delta Force leans a little harder on optimization, though the gap is small.
Delta Force
Loadout economy and objective sequencing set the floor
Insurgency
Loadout points and objective route 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.