Do clipless pedals make that much of a difference?

[BleeckerSt_Girl]

You can also change your foot position in clipless pedals (heel up; heel down) when you are in a long, grueling climb. Alternating positions uses different muscles and gives each muscle group a break. Don't think you could do that in toe clips.

I can change my foot position in all kinds of ways with my diagonal PowerGrip straps. Part of what I love about them. And yes I can pull up while pedaling too.