Which one do you like better? and why?
I prefer the round or ‘brilliant’ cut as they call it because that shape is timeless, it’s not a trend. It tends to sparkle a LOT more than a princess cut diamond as well.
Ask your jeweler to look at both under a microscope so you can see the difference in shine (your eyes work too but the microscope gives you a better idea.
If you saw the princess and fell in love with it though go for that. You have to follow your heart and sometimes no matter what logical reasoning someone else has for making the opposite decision it won’t sway your mind. Please make sure though that you aren’t getting the princess cut diamond because of it’s name, it does sound pretty but that’s kinda the idea.