head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Practiced Mastery
A cult RTS where peasants transform into warriors and micro decides skirmishes.

Optimization · Practiced Mastery
Tolkien-licensed RTS with freeform base building and large-scale faction warfare.
Battle Realms leans Optimization (Practiced Mastery); The Lord of the Rings: The Battle for Middle-earth II leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Battle Realms
Real-time micro of small squads matters.
The Lord of the Rings: The Battle for Middle-earth II
Moderate APM demands, forgiving unit control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Battle Realms
Human opponents adapt builds and harassment.
The Lord of the Rings: The Battle for Middle-earth II
Human opponents in skirmish reward prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Battle Realms
Minor map randomness.
The Lord of the Rings: The Battle for Middle-earth II
Mostly open information, light randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Battle Realms
Peasant economy and unit upgrades solvable.
The Lord of the Rings: The Battle for Middle-earth II
Economy, base layout, and faction counters drive wins
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.