Yes, the Integra has all of the Jupiter 50/80 sounds and many, many more. You can download the PDF tone lists on the Roland support pages. The Integra has more supernatural sounds than the Jupiters, and the complete library of 12 SRX expansions, which the Jupiters don't have (special strings, brass, complete orchestra, world etc.).
I think I have to test the Integra 7. For now, all the demos I've seen on youtube , I found the Integra sound very thin compared to the demo of the Jupiter 50 curiously...
2nd point, can you confirm the Integra 7 has ALL the sounds of the jupiter 50 ?
thanks