Most all Icom analog mid range hf rigs have about the same ears as far as sensitivity and dynamic range goes, I doubt you could tell them apart in the same mode and filter bandwidth.
Most of them also follow the same IF schemes of 70mHz 1st IF, 9mHz 2nd IF, 455kHz 3rd IF feeding the demodulator or yet another mixer for a fourth IF, and often use the same demod chips. The dual conversion rigs will IF from 70mHz to 455kHz. You will see the exact same circuitry blocks in the schematic, parts values, and general layout in all of them from about the IC745 onwards, main dif being now they're all smd rather than thru hole components, have a dds rather than a pll, and some are dsp/sdr. I suppose it's the same for Yazoo and kw rigs too.