SRAM rival 1x vs shimano 105 2x shifting “smoothness”

I disagree. I have one bike with mechanical 11 speed Force, and one bike with Force AXS. Both use the e13 9-46 cassette (one with 11sp and one with 12sp) and they “clunk” about the same. It’s the big gaps and the way SRAM engineers the shifting at the cassette IMO.