Having just gotten off the Wonder on Thursday, I don't know that I'd recommend doing two cruises so close to each other (within a month as you point out!) It was definitely much different weather as it was extremely cold the day we left.
But the good side is (and Bevtoy should be proud of me), we used the benefit of having just been at
Castaway Cay a few weeks earlier, coupled with the cooler temperatures, to spend the day exploring the rest of the island and doing all of the things that we'd never done before, having spent all the day on the beach. We didn't even put on our swimsuits that day, but instead spend the day riding bikes, exploring the island, checking out the Heads Up Bar, seeing the Observation Tower we'd only seen in a House Party video, and finally getting to see the adult beach, though from the safety of the road since our kids were with us. It was a wonderful day, and was much nicer than feeling like we had to go swimming in freezing cold water (high in low 70s that day for air temp) since we didn't know when we'd be back to the island again!
We did have moments (and have had many moments since this cruise) where we wished we were back on Cozumel in the 80+ degree temperatures, enjoying a beautiful day on the beach.