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.

Optimization · Practiced Mastery
Galaxy-spanning space sim about flight and trade.

Optimization · Practiced Mastery
Mastering samurai unit cohesion and clan-specific economic chains across feudal Japan.
Elite Dangerous leans Optimization (Practiced Mastery); Total War: Shogun 2 leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Elite Dangerous
Flight controls, docking, combat aim
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.
Elite Dangerous
Light PvP reads, mostly PvE
Total War: Shogun 2
AI daimyo follow scripted clan doctrines; human opponents require reads
Total War: Shogun 2 leans a little harder on variance, though the gap is small.
Elite Dangerous
Procedural galaxy, mission variance
Total War: Shogun 2
Metsuke agent skill rolls and random farm yields add moderate unknowns
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Elite Dangerous
Ship build, trade routes, engineering grind
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.