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
Ezio rebuilds the Assassin order in Rome, with a cult-classic mind-game multiplayer attached.

Optimization · Practiced Mastery
A back-to-basics stealth assassination game built on learnable guard patterns.
Assassin's Creed Brotherhood leans Optimization (Practiced Mastery); Assassin's Creed Mirage 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.
Assassin's Creed Brotherhood
Kill-streak combat is stylish but easy
Assassin's Creed Mirage
Stealth timing and parkour need modest precision.
Assassin's Creed Brotherhood leans a little harder on reads, though the gap is small.
Assassin's Creed Brotherhood
Hide-and-hunt multiplayer ran on human mind-games
Assassin's Creed Mirage
Guard AI fully scripted and mappable.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed Brotherhood
Fixed campaign content
Assassin's Creed Mirage
Patrols and tools mostly deterministic.
Assassin's Creed Mirage leans a little harder on optimization, though the gap is small.
Assassin's Creed Brotherhood
Recruit management and shop renovation economy
Assassin's Creed Mirage
Infiltration routes and tools reward planning.
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.