head to head
Grand Theft Auto V asks more than Skylanders: Swap Force, and the gap is execution.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.

Optimization · Practiced Mastery
A forgiving kids' brawler whose depth is toy-combo and upgrade collecting.
Grand Theft Auto V leans Execution (Practiced Mastery); Skylanders: Swap Force leans Optimization (Practiced Mastery).
Grand Theft Auto V leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Skylanders: Swap Force
Simple brawling tuned for children's reflexes
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Skylanders: Swap Force
Enemies attack on basic scripts
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Skylanders: Swap Force
Levels are fixed; only collectible spots are unknown once
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Heists, money loops, builds learnable.
Skylanders: Swap Force
Figure combos, upgrades and collectible routing are the depth
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.