There are lots of single hoop tents like the Akto. several European manufacturers do them.
However they are all slightly different from each other, just like every other traditional shape is (dome,geodesic,tunnel, A frame......)
It is going to be more and more difficult to design a tent that somehow is not like an existing design...
One of the features that distinguishes the Scarp is the freestanding option, two extra poles (that is how it can hold that much snow) .
Another is the easier set up, if you have ever tried setting up particularly the Vela or the Laser you would quickly notice that.
Not obvious, but most of the others have just one panel per half side, and that relies on un-even tension to stay taut.The Scarp has three panels on each half giving it a better shape. ( note how the Akto/Vela/Laser/ Vango Helium etc. often have part of the fly very taut and the rest very floppy/wrinkly)
(see my shock cord fix for the wrinkles on PhotoHikers shots) . That does not work with the others.
Those corner struts are also much stronger.
However as noted some prefer the fly to be down to the ground. More protection, more condensation...
Franco