The -72 just lands differently and you'll have to get used to that - that's basically it. Also it uses somewhat higher speeds, but there's no noticeable difference other than in the numbers themself. Generally the -42 seems to handle a bit nicer than the -72, (that's my opinion, some guys I know prefer the -72), but the procedures are the same and you'll fly the -72 just as you flew the -42 (I mean all the stuff you mentioned). The biggest difference you'll notice is in the electronic in the -500 (the EEC, the PEC, the MFC), which generally will make your life easier
