I just got the tree Austria pro. It is great. The little changes they made really add to the comfort. I think about my saddle less than before, and I hardly thought about the 3.2 before my injury.
I didn't like the mb 2.0 personally. The way my spine is (cervical and thoracic injury) limits what I find comfortable. For the price the ta pro was perfect.
I've flown older Buckingham's, OG treemotion, sequoia, and some weavers. A lot of times it's a try it and see what you like endeavor.
If you have an outlet near you they test saddles. I didn't have that luxury, but most reputable arborist gear sales places let you try and return if it isn't right, within reason.
What style of climber are you? What's your big needs/wants? Mine was an out of the box great fit with enough gear storage for work, very forward gear placement, upright for SRS climbing, suspender integrated, and padded enough for long climbs. Lower D's were a must too. The TA checks all of the boxes for a really palatable price point.