o.k., first I'll admit I haven't shot the interbond. That's from time constraints, though, not lack of interest.
The difference lies in the bullet construction. Look at Hornady's new website, and you will find the answer.
www.hornady.comAs for the SST's , I love them. I've shot some of my best groups in .25-06 and .30-06 with them. The terminal performance is astounding.
It's worth a look if you are looking for an alternative to Nosler.