For me it is essential that ever razor is super sharp at the toe. I have a goatee and shave the area between the two sides of my mustache in both directions from my lip to my nose side to side if that makes sense. It was also on one of these square tips a case manganesE from my grandfather that I learned to hone and shave. I also find the tip in the square tips great for side burns and working around the goatee for straight lines.
So I am a square tip fan. I feel like using the right stones with these razors makes all the difference in how quick these are to bite you. My case was evil and mean till I found this out.