If you’re just soldering switches, any iron will work just fine.
If you’re buying a bare PCB and plan on soldering all the components onto it, you will definitely want a beveled tip.
Louis Rossmann explains why in this video: https://m.youtube.com/watch?v=F05DvDJ4roM&pp=ygUXbG91aXMgcm9zc21hbm4gcmVkIHBpbGw%3D
Both full size, right?