Dbl-Wall Oil Tank- DeHoust vs Roth-Any Differences?

I have two Roths...

... and I am very impressed with them for something as simple as a oil tank. Plastic inner, galvanized steel outer skin with a takeoff from the top. In other words, these puppies never ought to leak, and if they do, an pop-up indicator will tell you that one of the tanks has a hole.

I also like the oversize fittings at the top that can be hand-assembled. The oil-level indicator is a cute float that whizzes up and down on a wound spring. Capacities range from 400 gallons down to 110, as can be seen on this page with tank specifications.

Getting them into place is a breeze because they don't weigh nearly as much as a traditional steel tank. Plus, Roth (thoughtfully) put lifting handles on the ends to make it easy. The tall, narrow shape allows these tanks to navigate through narrow doorways. If it's a tight location, you can gain capacity by tying multiple narrow tanks together.

The Roth header system allows you to fill a lot of tanks at the same time via two common headers (one supply, one vent), so that you only need two exterior wall penetrations, even if there are 5 tanks down there. Roth tanks can also be used on the exterior, though I think you need a Roth rain cap of some sort if you want to go that route.