Mechanical or hydraulic disc brakes?

Hydraulic discs (found on the SAVA 105 builds and the A7L Pro) offer stronger, more modulated braking in wet conditions and require less hand force — a real advantage on long descents. Mechanical discs (Schwinn Phocus) and rim brakes (Tommaso Claris builds) are cheaper and easier to service roadside. For a bike you'll keep for years and ride in mixed weather, hydraulic is the upgrade most reviewers say they don't regret.