In isolation, applying to a college (any college) EA is better because you could know a result earlier, which could alter your application strategy afterward. For example, any EA admission that is affordable becomes a safety, so you may be able to drop any applications to colleges that you like less than the colleges you have affordable EA admissions to.
Where it may get complicated is if any of the EA colleges have restrictions against applying EA to other colleges, so that you may have various sets of possible EA applications among the college where EA is possible. MIT is not restrictive in this sense, but HYPS are, so applying EA to any of HYPS excludes applying EA to the others among HYPS as well as MIT and other private schools. You may apply EA to MIT and other non-restrictive EA schools, but cannot apply EA to any of HYPS if you do so.
For colleges with rolling admissions, it is generally better to apply early, since you are likely to know the result early. At some colleges, the college or its popular majors gets more selective later during the admission season as it gets filled up.