JetBlue or Delta?

Hi there,
Today I wanted to ask the forum a quick question. Me and my family have just booked our summer 2019 trip to Providenciales,Turks and Caicos. Now we are looking to book the flights. We depart out of JFK for all of our summer trips + Italy. Two airlines operate the nonstop route, Delta and JetBlue. Delta operates this route with 737-900’s, and JetBlue does with A320’s.
For those of you who have been on any of those certain planes, which one would you recommend is better than the other for this 3 and a half hour flight? I have been on both before, but not these certain planes. Opinions on the comfort, IFE or food would be great! Thanks!!

Take a look here :)