kubota u45 compared to kx-161

there seems to be a lot of guys liking there kx161, what about its zero turn brother the u45 is it a good rig. seems to be lots of parts for this machine must use a engine that is run in the bobcat skid steers, i think its a v2203m, where the 161 runs a v2403m.
for those who have ran both will the u45, hang and hold up has well has the 161

kubota u45 compared to kx-161