Diving--better at Caye Caulker/Blue Hole Belize, OR Little Corn Island, Nic

I learned to dive at Utila, Bay Islands, Honduras and since then have been diving in the Galapagos Islands.

I have a trip planned for March 17-24. Due to the short duration of the trip and our location in middle America, USA, flights are shortest and most direct from us to either Belize City or Managua, Nicaragua (where we would then catch a flight to Big Corn Island).

Has anyone been to both? Which has better diving? SCUBA diving is the reason for the trip. I've researched both Little Corn and Caye Caulker and both seem just fine and lovely to me.

Any preferences?

Also, cheaper might be better. It seems diving on Little Corn is quite a bit less than on Caye Caulker. Is that true?