I took 2 Quad Bike tours by different companies in Gozo when different friends visited, so I can compare them directly. Gozo Pride does a main island hotel pickup, ran us around all over the island on a quad bike for 4-5 hours, and then has a shuttle zoom you by Comino and shuttle you back to your main island hotel.
The problem with Gozo Pride is you race around but you don't see even half of what you could be seeing. For specifics, we drove 3 blocks away from the beautiful Ramla Cave without stopping, and instead had 45 mins sitting around the not-so-scenic Ramla Beach. We skipped a beautiful hidden Window (drove within 100 feet of it!) and instead went to the former spot of the fallen Azure Window which is now just a shoreline. At the salt pans, we didn't stop, just raced by. At the end, our return trip boat swung by and had us peek at the Blue Lagoon for about 30 seconds from a mile away as we were shuttled back.
Lots of quad biking around, but very little was seen.