head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Pure Optimization
A pausable tactics RPG where party build and tactic-slot planning win fights.

Optimization · Pure Optimization
A focused Total War set in Viking-age Britain, trading scale for tighter kingdom management.
Dragon Age: Origins leans Optimization (Pure Optimization); Total War Saga: Thrones of Britannia leans Optimization (Pure Optimization).
Total War Saga: Thrones of Britannia leans a little harder on execution, though the gap is small.
Dragon Age: Origins
Tactical pause combat, low input demand
Total War Saga: Thrones of Britannia
Real-time battle micro matters in close fights
Total War Saga: Thrones of Britannia leans a little harder on reads, though the gap is small.
Dragon Age: Origins
Enemy AI is scripted
Total War Saga: Thrones of Britannia
Multiplayer battles involve some human prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Age: Origins
Hidden rolls and loot tables
Total War Saga: Thrones of Britannia
Campaign events and AI moves add mild uncertainty
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Age: Origins
Tactics slots, builds, party synergy dominate
Total War Saga: Thrones of Britannia
Settlement planning and army composition decide the campaign
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.