Regal increasingly tosses around the term “power of choice,” a reference to the fact that numerous models, including the new 21 OBX that is the subject of this boat test, come in both sterndrive and outboard versions. Aside from the obvious difference in engine type, the outboard version also offers substantially more stowage. With the engine hanging off the transom, much of the space reserved for that sterndrive engine becomes a lazarette. The space formerly occupied by a V-8 now lies vacant and waiting for tow tubes, inflatable stand-up paddleboards, beach chairs, and all manner of maritime miscellany. The swim platform does get bisected by that outboard, much to the chagrin of many a sterndrive enthusiast. But it’s also substantially larger to port and starboard, wrapping around the engine while including a covered boarding ladder on the starboard-side.