Version 2 vs 3, which to build

I’ve been looking at both v2 and v3 and am leaning towards version 2. I’ve found few posts discussing the advantages of the newer version, nothing recent. Can you good folks break down the pros/ cons of the different designs?
Many thanks
-John, nz0s

V3 is way more rigid with the alumium profiles.That makes it more expensive.
If you intent to use it permanently outside I would go there.