well besides the biggest difference being the covers, not sure. Threw the Jolt Particle in a demo day a few days ago and it was extremely smooth, but what do you expect out of sanded particle. I am assuming the pyro will have more on the backs just due to its finish. If you are looker for a longer reaction then the pyro but if you are looking for something inexpensive and earlier reading, then jolt particle. Hope that helps.
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If it isn't EBONITE it isn't bowling........