Welcome to FlyerTalk, zwickhenry.
That sounds like a very interesting trip.
Abercrombie and Kent, National Geographic, Tauck and that lot charge considerably more as they use premium hotels, transportation, options etc. and include tips to guides and drivers, etc.
Other OFAC licensed companies may charge less and offer fewer meals, leave tipping to individual travelers, opt for lower cost food and lodging.
They most likely all offer good value for the price, and the varied programs offer a lot of individual choice.
We may have to start a thread for the different US licensed groups offering travel to Cuba.