head to head
Crimson Skies: High Road to Revenge asks more than Grand Theft Auto V, and the gap is execution.

Execution · Practiced Mastery
Pulpy arcade dogfighting game set in an alternate 1930s of air pirates.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Crimson Skies: High Road to Revenge leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Crimson Skies: High Road to Revenge leans clearly harder on execution.
Crimson Skies: High Road to Revenge
dogfighting aim and stunt flying carry combat
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans a little harder on reads, though the gap is small.
Crimson Skies: High Road to Revenge
AI pilots follow mappable patterns
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Crimson Skies: High Road to Revenge
some scripted surprises on first play
Grand Theft Auto V
Some mission and lobby randomness.
Crimson Skies: High Road to Revenge leans a little harder on optimization, though the gap is small.
Crimson Skies: High Road to Revenge
plane choice and mission routing are learnable
Grand Theft Auto V
Heists, money loops, builds learnable.
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.