Sent you a PM. I've got a pretty long list of beefs with the purchase but I'm not sure if I blame most of my problems on Regency or the dealership. It has been very frustrating. The Mercedes side has been very good and other than my 2021 Regency having a 2019 chassis (manufactured in 10/2018) and not supporting Android Auto (deactivated at the factory for some unknown reason) - I've no complaints. Still researching that issue.
I've noticed in running several Regency VINs through a VIN decoder that some of the recent deliveries, including RVs at the January Tampa RV show, were built on even older "2019" chassis. Some were without all the feature packages that we've come to expect from all the LTV and Regency videos. I rejected one Ultra TB which didn't have the 10" MBUX entertainment system and had a 65MPH limiter installed.
Yes, Regency Ultra and LTV Unity are just two different implementations of the same general designs. It seems to me that LTV does a better job in educating and supporting the owners. Regency documentation is very lacking. There's a difference in standard equipment that you need to understand when comparing prices. Ex: Regency is standard with Equalizer levelers and aluminum wheels but you pay extra for Winegard 4G/LTE. As far as components - Regency sometimes uses different brands (not necessarily inferior ones). Going by the videos I've found - the brands sometimes changes. Maybe that's a industry wide problem due to supply shortages (Covid19).
One Regency option I liked that I didn't see on Unity - blind-spot cameras (in the mirrors) that display on the 10" MBUX entertainment system when you use the turn-signals. Unfortunately it was broken on my unit and I'm not getting good responses from the dealer on when it will be fixed.