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

Optimization · Pure Optimization
A real-time strategy game where mastering build orders and economy management decides most matches.

Optimization · Pure Optimization
Fantasy RTS spin-off of Rise of Nations with three wildly asymmetric civilizations and hero units.
Age of Empires II: HD Edition leans Optimization (Pure Optimization); 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.
Age of Empires II: HD Edition
click speed and micro help but secondary
Rise of Nations: Rise of Legends
Real-time economy and army juggling needs speed
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Age of Empires II: HD Edition
predicting human opponent strategy and timing
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.
Age of Empires II: HD Edition
minor map and resource randomness
Rise of Nations: Rise of Legends
Map layouts and neutral sites vary
Age of Empires II: HD Edition leans a little harder on optimization, though the gap is small.
Age of Empires II: HD Edition
build orders and economy are near-solvable
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.