Kubota Kx151

We may be acquiring a KX151 in a few months and I'm having a hard time finding any literature on this machine. From what I can tell it evolved into the kx161. Does anyone have any literature or experience with the KX151 they could share? I used to run a kx121-3, any input on how the older heavier machine would compare to the newer lighter machine? Thanks.

Kubota Kx151