Probably obvious, but the pre amp section of different receivers could sound different. DACs, op amps, volume control, etc. I would not expect a big difference given how well pre amp stages have measured in bench tests. Of course, some people will claim big differences. It's debated endlessly on here, whether such things matter.
Many receivers don't put out a high pre amp signal - one Volt RMS. Some will put out more. Depending on the amp, that might be helpful.
Assuming you are not worried about pre amp level, or pre amp sound quality differences, the next factor would be features.
Many receivers don't put out a high pre amp signal - one Volt RMS. Some will put out more. Depending on the amp, that might be helpful.
Assuming you are not worried about pre amp level, or pre amp sound quality differences, the next factor would be features.