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 · Competitive PvP
A tactical shooter where precise gunplay against human opposition is the deciding skill.
Execution · Grand Arena
A hero shooter where teams brawl over objectives using locked ability kits.
Counter-Strike: Condition Zero leans Execution (Competitive PvP); Overwatch 2 leans Execution (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Counter-Strike: Condition Zero
aim and spray control decide duels
Overwatch 2
Aim and ability timing decide most duels.
Overwatch 2 leans a little harder on reads, though the gap is small.
Counter-Strike: Condition Zero
predicting human opponent positioning
Overwatch 2
Adaptive enemy comp counters and ult baiting.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Counter-Strike: Condition Zero
buy-round economy and drops vary slightly
Overwatch 2
Minimal randomness, mostly map and matchmaking.
Overwatch 2 leans a little harder on optimization, though the gap is small.
Counter-Strike: Condition Zero
economy management and utility usage solvable
Overwatch 2
Comp building, ult economy, and cooldown tracking.
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.