Purpose of using elliptical vs circular transition radius?

[PancakeBones]

I've just heard a quarter pipe can be built with an elliptical radius, what is that used for? What does it help?

Does it feel completely different or skate similarly?

[Thom]

Elliptical pushes your weight into the ramp when you’re approaching the coping which helps you stay on top of your tricks… circular is very hard to control

[Chavo]

Why make a new thread for this?

I've made dozens of miniramps and quarterpipes and always draw elliptical transitions. For small ramps, it gives you a mellow transition that's easy to land tricks with a workable lip (gets it closer to vert). If you can find Neil Blender's Speed Freaks part, his backyard ramp is a good example (I wouldn't recommend making it that steep though). I'd be surprised if it's even 4' tall, but he can still lock into smith grinds.