Don’t know much about either company or who created what first. However, I’ll be purchasing this tent. Excited to use a tent with TNT fabric. Should be released shortly.
ArcDome 2 Ultra
The ArcDome is a double wall, two-person, lightweight 4-season freestanding backpacking tent, made from high-performance Ultra TNT laminate.www.tarptent.com
It's pretty well understood that Durston was the first to bring the offset inner to the backpacking tent world.
What's the reasoning behind wanting the TarpTent instead? I've heard good things about their tents.