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

Optimization · Pure Optimization
A deeply optimizable tactical RPG where armor stripping and initiative manipulation produce near-deterministic victories.

Optimization · Pure Optimization
Mastering interlocking social engineering and tech-tree systems on a programmable alien world.
Divinity: Original Sin 2 leans Optimization (Pure Optimization); Sid Meier's Alpha Centauri 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.
Divinity: Original Sin 2
Turn-based system demands zero reaction speed or motor precision
Sid Meier's Alpha Centauri
Turn-based; no twitch element at all
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Divinity: Original Sin 2
Multiplayer PvP arena adds light opponent-reading; solo is scripted
Sid Meier's Alpha Centauri
AI faction leaders follow fixed personality scripts
Divinity: Original Sin 2 leans a little harder on variance, though the gap is small.
Divinity: Original Sin 2
Source point limits and hidden enemy armor values create unknowns
Sid Meier's Alpha Centauri
Xenofungus and psi combat add some irreducible randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Divinity: Original Sin 2
Lone Wolf builds and damage-type stacking define solved optimal strategies
Sid Meier's Alpha Centauri
Tech tree, social engineering, and base placement are essentially solvable
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.