Ultracrash pads are thinner and made out of "medical" grade gel, but does that help it protect the skater more than the waxel pads? I've noticed that the shape of the pads are very similar, but the materials used are different. Does this make one pad more effective than the other? The Ultracrash pads have ridiculous prices and the Waxel pads are way cheaper, so I'm leaning towards the waxel pads, but I'd like if you would share your opinion on which one works better. thanks!