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 · Practiced Mastery
Tests class counter knowledge and objective control with lighter economy than classic RTS.

Optimization · Mind & Math
Norse-flavored RTS with tile control and seasonal pressure.
Command & Conquer 4: Tiberian Twilight leans Optimization (Practiced Mastery); Northgard leans Optimization (Mind & Math).
Command & Conquer 4: Tiberian Twilight leans a little harder on execution, though the gap is small.
Command & Conquer 4: Tiberian Twilight
Unit micro and crawler repositioning under pressure
Northgard
light micro under pressure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Command & Conquer 4: Tiberian Twilight
Class picks and feints against humans reward prediction
Northgard
MP vs adaptive humans
Northgard leans a little harder on variance, though the gap is small.
Command & Conquer 4: Tiberian Twilight
Little hidden beyond fog of war
Northgard
winters, wandering events
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Command & Conquer 4: Tiberian Twilight
Class counters, population caps and objective control are studyable
Northgard
clan economy and tile control
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.