Nope, this is about it. They try to force the larger users into the expensive cards by prohibiting datacenter use in the driver EULA. This works sufficiently well in America, but it also means that you can find German companies like Hetzner that will happily rent you lots of consumer cards.

(There are also some density advantages to the SMX form factor and the datacenter cards are passively cooled so you can integrate them into your big fan server or whatnot. But those differences are relatively small and certainly not on their own worth the price difference. It's mostly market segmentation.)