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 · Pure Optimization
A focused Total War set in Viking-age Britain, trading scale for tighter kingdom management.

Optimization · Pure Optimization
A blade-driven JRPG won by chain-attack routing and combo optimization.
Total War Saga: Thrones of Britannia leans Optimization (Pure Optimization); Xenoblade Chronicles 2 leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Total War Saga: Thrones of Britannia
Real-time battle micro matters in close fights
Xenoblade Chronicles 2
Auto-attack with art-timing inputs
Total War Saga: Thrones of Britannia leans a little harder on reads, though the gap is small.
Total War Saga: Thrones of Britannia
Multiplayer battles involve some human prediction
Xenoblade Chronicles 2
Scripted enemies
Xenoblade Chronicles 2 leans a little harder on variance, though the gap is small.
Total War Saga: Thrones of Britannia
Campaign events and AI moves add mild uncertainty
Xenoblade Chronicles 2
Blade gacha and crit rolls
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Total War Saga: Thrones of Britannia
Settlement planning and army composition decide the campaign
Xenoblade Chronicles 2
Blade combos and chain attack routing central
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.