head to head
Brothers in Arms: Earned in Blood asks more than Grand Theft Auto V, and the gap is optimization.

Optimization · Practiced Mastery
Tests solving suppress-and-flank squad puzzles more than raw shooting.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Brothers in Arms: Earned in Blood leans Optimization (Practiced Mastery); Grand Theft Auto V 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.
Brothers in Arms: Earned in Blood
Deliberately loose aim makes positioning matter more than twitch
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.
Brothers in Arms: Earned in Blood
AI flanks reactively but follows mappable suppress-and-flank logic
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Brothers in Arms: Earned in Blood leans a little harder on variance, though the gap is small.
Brothers in Arms: Earned in Blood
AI repositioning varies runs slightly between attempts
Grand Theft Auto V
Some mission and lobby randomness.
Brothers in Arms: Earned in Blood leans clearly harder on optimization.
Brothers in Arms: Earned in Blood
Suppress-then-flank squad puzzles are the entire core loop
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.