I haven't put many hour on my JD2320 but I have dug up and shredded some good size sapplings. (up to 5" dug, 3" push over and shredded) Spec says 1" for 48" Frontier RC.
The 2320 could have more hyd. power but then it would be more than frame is rated. Overall it is sized correctly. Once I finish clearing it will be more tractor than I need. Perfect fit for 3-5 acres.
Low range could be lower. The Kubota B-2500 had 3 ranges. The low range was powerful, but the cost was about $2200 higher and reviews said they have to wait on parts. Not what I hear about JD. John Deere is assembled in USA with many parts made in US. Kubota is all foreign.