head to head
Total War: Shogun 2 asks more than Grand Theft Auto V, and the gap is optimization.

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

Optimization · Practiced Mastery
Mastering samurai unit cohesion and clan-specific economic chains across feudal Japan.
Grand Theft Auto V leans Execution (Practiced Mastery); Total War: Shogun 2 leans Optimization (Practiced Mastery).
Total War: Shogun 2 leans a little harder on execution, though the gap is small.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Total War: Shogun 2
Samurai unit micro, zen arts timing, and castle sieges reward sharp play
Total War: Shogun 2 leans a little harder on reads, though the gap is small.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Total War: Shogun 2
AI daimyo follow scripted clan doctrines; human opponents require reads
Total War: Shogun 2 leans clearly harder on variance.
Grand Theft Auto V
Some mission and lobby randomness.
Total War: Shogun 2
Metsuke agent skill rolls and random farm yields add moderate unknowns
Total War: Shogun 2 leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Total War: Shogun 2
Clan-specific mastery paths and trade port chains are the core solvable layer
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.