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
Spice economy management and build-order knowledge with modest micro demands.

Optimization · Pure Optimization
Fantasy RTS spin-off of Rise of Nations with three wildly asymmetric civilizations and hero units.
Dune 2000 leans Optimization (Practiced Mastery); Rise of Nations: Rise of Legends 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.
Dune 2000
Unit micro and build speed matter at competitive pace
Rise of Nations: Rise of Legends
Real-time economy and army juggling needs speed
Rise of Nations: Rise of Legends leans a little harder on reads, though the gap is small.
Dune 2000
Human skirmishes add some build-order mind games
Rise of Nations: Rise of Legends
PvP rewards countering opponents' hero and tech commitments
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dune 2000
Fog of war hides enemy composition until scouted
Rise of Nations: Rise of Legends
Map layouts and neutral sites vary
Rise of Nations: Rise of Legends leans a little harder on optimization, though the gap is small.
Dune 2000
Spice economy and build orders decide most games
Rise of Nations: Rise of Legends
Asymmetric faction trees and expansion timing reward deep study
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.