Oooooh....some great advice here!!! Can't wait for Einseine to weigh in as she has both!- as did I!
I LOVE a 6-pronger.......it's gorgeous, elegant, and secure. I also find that since the prongs encircle the diamond, it makes it look larger in a way.
Now, my current e-ring is a 4-pronger, but the claws are "doubles", so it's a bit more unique than your standard 4-prong setting. My stone is approx 1.3 cts (although looks larger) and some have thought it looks like a cushion due to the way it's set.
It's all a matter of personal preference. You can't go wrong with either. Both are elegant, classic, and timeless. I'd suggest trying some on in person to see what looks prettier on your finger!