The Sheeva is twin tip and 6mm wider, which doesn't seem like a lot, but the profile makes it a bit more powder specific.
Glad you found the special feel from the Samba that I've grown to love. Its truly a great all mountain ski with an off piste bias. When you know how to drive her, she's happy to serve up rewards that are indescribable!
Decisions, decisions for the move to Utah! Seems I'd be better served going into the 110 width range to compliment the Sambas. Not sure it'd be necessary, though?? Each run on the Sambas, I found myself going faster and faster, but never FELT like I was going faster in that they were so stable! And I had no trouble making shorter radius turns on them, either, even at slower speeds near the bottom of the runs. We are making another Utah trip in a few weeks, and I'll only be bringing one pair of skis