I agree, the location plays a very important role however I would assume, I have both radios, both with the exact same frequencies and both have the exact same antenna. Out of the Box, the 436 is damn good. I have to adjust a bunch of things in the trx-1 just to get a halfway decent signal and the uniden is clear as a bell. I am not far from the repeater that is transmitting the P25 and as a matter of fact, at times the TRX 1 stops when the signal is being transmitted but missed the voice all together.
What a waste of money in my book and trust me I am very critical of the uniden as well, I had my upswith the Uniden, after all the upgrades it works fantastic.
Again other users may have different experiences but mine are not so good with the TRX-1.