The right motor system depends first on the power already available in your equipment. This guide explains how a 24V brushless DC motor differs from an AC-input brushless motor in power conversion, controls, wiring, and selection, so purchasing and engineering teams can compare complete drive systems, not just motor labels.
Both grades are ferrite powder in a rubber binder. The difference is whether the particles are aligned during manufacture, and that alignment decides how much holding force you get from a given thickness.
A DDP quote looks simpler because one price covers everything to your door. The trade-off is less visibility into freight and duty costs, and in the US a customs liability that does not always move with the price.