Thanks, I hadn't thought about the url changing, and the treasuries and favorites. I generally renew the same item and use copy for new things. Mine are all OOAK too, so I have to change all the specific info, but at least I don't have to retype everything!
I'm still curious about what happens behind the scenes on etsy, though. Why is a renewal not counted as an event in shop stats? And why can you not share it on facebook the same way you can with a new item? Just wondering what else is different with a renewal, and if there might be some advantage to making a new listing. LIke is there a difference in search? Or do the number of views, favs, treasuries, etc. help it in go up in search relevancy, in which case renewing is definitely better?