Nice explanation, in case a visual helps:
https://www.handgunhero.com/compare/sig-sauer-p320-x-carry-vs-sig-sauer-p320-xcompact
https://www.handgunhero.com/compare/sig-sauer-p320-xfive-legion-vs-sig-sauer-p320-xcompact
Honestly depends on which model setup you run. I prefer my legion to my 226 but the stock 226 has a much better trigger pull than my original nitro LE model.