I just found out tonight that my TX cables work on my UX and vice versa. the tips on the AC cables are the same size and they also are both 16 volts. Considering that AC cables can run $100 after taxes and shipping that can mean a real savings. So if if anyone over here wants to add a UX PC to your arsenal, now you know your TX cables will juice it up.
Note: this has never been noted officially in any info from Sony and I have never heard/seen this on any site before.