Vanderhall is the three wheeled car experience and the M3W is the three wheeled motorcycle experience.
After looking at a Vanderhall (didn't get to drive it) I think that is likely an accurate summary.
I drove ACE#10 to look at the Vanderhall and basically parked it in the dealership's entryway. When I was inside looking at the Vanderhall the sales guy asked me if that was my Morgan out front, I said, "nope"; he looked puzzled when I got back in ACE#10 and rumbled away!
Polaris slingshot is... imo is really ugly.
IMO, it's an inbred Transformer, and NOT in a good way!