Occasionally there's some controversies about which Jupiters were used on Duran Duran, but the simple answer is: both were!
Rio uses the Jupiter-4 in the beginning opening for its arpeggio
Hungry Like the Wolf uses the Jupiter-8 for its random arpeggio
If you're familiar with both sound profile of each it's pretty obvious, and in various places Nick Rhodes attests to this being the case as well.
Save A Prayer uses a SH-2 sequenced up to a CSQ-100.
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