You probably meant the 16DB vs. The 212bhs. The 21BHS would de the best, its hard walled all the way around good for insulation and has a lot more space than the 16. On the other hand, depending on where you plan to camp the 16's "tip out bunk" is basically a tent sticking out the side of the camper, which is a big window of opportunity for mother nature outside to move inside. Mosquito's will defiantly make it inside because the tent part is not sealed all the way around. It will the the Heat in and Cold out on hot summer days and The cold in and heat out on cool winter days, because of the tent factor ("tip out bunk"). Remember, It depends on where your going to camp if their any starving animals outside the"tip out bunk" will make a "window of opportunity" for them to get in side and start muchig around in side your camper. Bears will do it whether your inside it or not. The "tip out bunk" is that window or passage way for the animals to get inside mine as well be an open door. The 21BHS is the safest and most long lasting bet. (long lasting; as the animals wont tear through the "tip out bunk"'s fabric/vinyl, which will deteriorate really fast anyway). The 21BHS will be the best safest most long lasting a economical camper, compared to the 16.Get the 21BHS. It doesn't leak, as the 16 could around the "tip out bunk". The 21BHS is more secure than the 16, and finally the 21BHS will have the best quality. The 21BHS is the best choice.