I have a friend who went to Westpoint and another at the USAFA, both have agreed that the difference between the academy and NROTC is this:
Academy= long and hard
NROTC= long and not so hard
OCS= short and hard
Both of my friends also told me that they wish they would have had a normal college experience with full summer vacations, being able to go home on a whim if need be, being able to sleep in and skip class after a long hard night at the bars, and not getting in trouble for breaking "stupid" rules that do not exist at a normal college.
Heeding their advice, I chose not to even look into the academies.
Anyhow, I am not speaking from experience just from hearsay. Having the Naval academy on your resume wouldn't hurt, but college is so much fun, why would you want to miss out on that?