Hearing you’ve never ridden Campy, I have to agree that you should absolutely try it first. It has thumb shifters, so it’s quite different. So, you’re looking at different geometry and different shifting systems. I know in todays world it’s really hard to find bikes to try, but if you look at the geometry of your current bike and compare it to the others using the advice from CT above, you’ll have a good idea how the different frames will feel, so then you just need to find a Shimano/SRAM/Campy bike to try the shifting.