There is just the amount of difference between the two islands that I would not plan to much. Not for a day trip.Just enjoy the difference.Bring your snorkels, You can do that at the split Just come here and walk around, go swimming ,have lunch. If you came early you could do a half day snorkel trip to our three snorkel spots, they leave at 10;30 am and get back around 1 pm. You could still have lunch and walk around. Our first trip here was to A.C, the next we came here. That was 8 years ago. We are now Belize residents, working, making a living, at least during high season. You will have a good time in either place. I am just partial to my community.