they are total opposites. jax is the busiest location by far. its very hectic at times. While SUA is very relaxed. However i hear there isnt much to do in stuart. Jax has lil more to offer. and there are more people there, so its a little more fun. I did all of my training at JAX. if i could do it all over again, I would probably do in Stuart. But then again thats just another "is the grass really greener on the other side" storyline. But both locations have very nice housing. The instructors at both locations are great.