I have a Tree Austria III for my personal saddle. I really enjoy how lightweight this saddle is.
It has quite a lot of gear loops to store any extras you care to take into the tree with you. I prefer to keep my saddle pretty bare, just an extra carabiner or two, during regular prunings to keep it light.
I think the leg and back padding is minimal, but comfortable for most pruning applications. For big removals, where a bigger saw is necessary, this saddle doesn't have a whole lot going for it. There could be a little more support.
For my work saddle, I have a Buckingham Glide II. This saddle is very similar in design to the Tree Austria III, but its a lot heavier. This is better in some ways, it has much more padding and support.
It also has metal clips on both sides, making it unnecessary to have a caritool. The back support is great on this saddle, and there is enough space to store the necessary gear.
Overall these are both similar saddles, but they have their positives and negatives.