Apart from the panels and controls, is there much difference in the two radios?
I would like the one with best strong signal handling and 6 meter use.
I have a 480 SAT and 570D(G) (no 6m) and have owned both for several years. When I play radios side by side on HF bands they both hear about the same thought 480 is a bit quieter due to mixer design. The 480 handles QRN a bit better and selectivity wise front end is a tighter too on SSB even when both rigs have opt 1.8khz filter installed. I suspect that 6m is same. What sold me on a 480 was 3 years ago I was up playing with one at a "candy store" and there was a local ham on CW that was thumping front end on a few other rigs there that I was playing with (and cost a lot more too) and 480 was not effected. Never really had a problem with my 570 being thumped but I also by default leave preamp off unless it is really needed.