We have also done both. We did Sorrento, Positano, Pompeii last month (Aug). What I like about this tour is it includes both the Amalfi Coast and Pompeii. Here is a link to some of our pictures,
Med Cruise 22 (shutterfly.com)
And, here are some pictures from the Amalfi Coast by sea excursion (from a little longer ago)
Mark and Karen Europe 2012 (shutterfly.com)