The shortest and easiest answer is this, The Endure and Persevere both look identical on paper spec wise, the difference again is the the blend of the coverstocks from what I understand. I asked this at a ball demo a couple months back when the Persevere was set to hit the market.
The trend lately seems to be hybrids, where the difference is from what Im told is the Endure has more solid than pearl, not a 50/50 blend, with the Persevere having more pearl than solid blend, when you look at both balls side by side you will definitely be able to tell the difference. As for the bowler, the Endure most times will be earlier and mover even in nature, where the Persevere will be a tad longer and more pronounced on the backend.
This is one area that from my dealings with customers in the shop is the most confusing for folks shopping the Ebonite brand, alot of folks like to know wether they are purchasing a solid, pearl or a hybrid, and when they go to the site and pull up balls, all they get is a generic description on coverstocks. Just my two cents..hope this somehow helps....