Rival eTap AXS vs older Ultegra

My current road bike came with 105. There was a mechanical Ultegra version of the same bike, but it was £600 more expensive. Literally the only difference was the groupset and carbon bars. Frameset and wheels were identical. I’ve had bikes with older Ultegra too. I honestly can’t tell any difference. My mtb has SRAM X01 Eagle and I think it shifts a little more precisely, but that could just be the thumb shifter and 1x setup. I haven’t had any reliability issues with any of these setups, which is another reason I’m slightly reluctant to go electronic. Yet more batteries to forget to charge!