Join Date: Dec 2010
Location: southern Arizona
The Kimberly line normally has a 2 year warranty on the tree IIRC, while the DownUnder line has a 10 year warranty. The leather would probably be somewhat thinner and stiffer on the less expensive line, although I don't own one to compare.
They are also different styles. One is more English style with more padding, while the other is more western style with a different shaped tree. DownUnder recommends the first for horses with taller withers, and the second for those with small withers.
You can email DownUnder and ask them to compare different models and they will give you a reasonable answer. I asked them about two very similar saddles at about the same price, and they said one felt more like an English saddle than the other, although outwardly they looked the same.
"Make the right thing easy and the wrong thing...well, ignore it mostly."