This is kinda a loaded question in the fact that correct me if i'm wrong but no two boats actually use the same hull from either brand. All the hulls between the two are different,if not just slightly.

Once you get into either brand you can have boats come in different trims yet still be the same boat or actually come as a preloaded option boat IE Mobius version of the LSV or just Moomba LSV.

Definetely Supra gets the Bling and slightly highre quality on finishings etc but basic boat hulls and funtional parts etc are built to the same specs.

Both brands are very similar in there lineups as they both have a model either way that compliment one another, EXCEPT the supra lineup does NOT include any DD SKI boats,only Moomba. They used too but have not for a few years now.

A lot of it comes down to priorities. How bad do you want "X" boat and how much are you willing to spend. Is Bling and name factor a big part of your decision or not. EITHER BRAND sells Quality boats. I've had friends who own many other brands all say they LOVE my boat and wouldn't have minded saving some cash having the same boat.. Enough said.