I'd check the MakeMKV site, since I assume you're going to want to flash the firmware on the drive, and they have a compatibility list and other details on why you need to flash the drive. (that's the program most people use, although I think there are other options if you prefer)
One other aspect that may or may not be important to you is UHD (4k disc) compatibility. I don't have a USB drive but I bought one that supports UHD discs, but it isn't the best at ripping them, it's reliable for normal blurays but can sometimes take a couple tries to get through a UHD disc. Not sure if that's common with all drives, I assume some are better at it than others.