You basically have 3 choices:
- Odroid
- BeagleBone Black
- Raspberry Pi
because they are the only ones with vendor support for OS firmware.
If that's your concern, sure, I guess. It's not something I've ever considered. But when you say vendor support, do you mean tech support or updates
The OS firmware on the SBCs is updated from two others I checked for - the Orange Pi and the Rock Pi. Vendors usually don't offer much tech support anyway. Unless you're an OEM buying in volume. They're not going to give you much help for a $25-100 device, at least not at the level needed for most people playing with these.
What kind of support are you looking for? Are you doing special products with these SBCs?