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
Fantasy RTS spin-off of Rise of Nations with three wildly asymmetric civilizations and hero units.

Optimization · Pure Optimization
Large-scale RTS famous for strategic zoom, thousand-unit armies, and a streaming mass-energy economy.
Rise of Nations: Rise of Legends leans Optimization (Pure Optimization); Supreme Commander 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.
Rise of Nations: Rise of Legends
Real-time economy and army juggling needs speed
Supreme Commander
Massive APM demands across strategic-zoom battlefields
Supreme Commander leans a little harder on reads, though the gap is small.
Rise of Nations: Rise of Legends
PvP rewards countering opponents' hero and tech commitments
Supreme Commander
PvP hinges on scouting and countering opponent commitments
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Rise of Nations: Rise of Legends
Map layouts and neutral sites vary
Supreme Commander
Deterministic engine; only unscouted intel
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Rise of Nations: Rise of Legends
Asymmetric faction trees and expansion timing reward deep study
Supreme Commander
Streaming economy and build-order efficiency are the backbone
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.