I was looking for a vertical mount bike rack and did some cross shopping with other major (i.e. Thule) and less-major brands.
The features that stuck out:
-rubber-only contact (well.. had to modify with pool noodle for the kids bike)
-hydraulic dampers (for self lowering the rack; this one is only for lowering while Thule is bi-directional)
-"camping mode" (you can drop the rack horizontal with ground for bike parking)
-garage storage (comes with brackets to hang the rack with bikes on the rack to garage wall)
-hitch locking mechanism (I think most major ones have this as well. The Velocirax just uses a 17mm wrench/socket to stabilize the rack once in the receiver).
It's very similar to the Thule ReVert, but the Velocirax I believe has higher carrying capacity (overall and per bike tray, if you're hauling heavier bikes like e-bikes).