I know the difference between standard foam and exotic foam is the rubber content but what is the difference between compounds when they are the same hardness like a green and a white jaco are both listed as a 25 hardness?

Std. rubber has the least bite (blue breen ect.) exotic has more (white, black, ect.) then Natural rubber (Pink, purple, ect.) has the most.

So, Green, white, pink, with the same durometer readings have increasingly more bite and Natural rubber lasts WAAAAAY longer.

Later, Bret

Thanks for the info,Rick