The GN will not arbitrarily pull easier than a BP. That's a function of the type of tires and their rolling resistance, the trailer's weight, height and shape of the nose. There are three types of GN nose configurations that will afford different wind resistances; a square or rounded full width front, a tapered body and a "V" shape. The "V" offers the least wind resistance, and will result in a slightly better fuel mileage.

As mention many times, you will find towing a GN to be a very stable and secure feeling. The larger additional interior volume is welcomed, and can be used for many types of traveling, from full LQs to basic storage. It's very convenient to have everything already stocked in the trailer when ever you need to use it.

If you plan on using the bunk area for sleeping, make sure the trailer's height is high enough to allow a sitting posture, whenever you are occupying that space. Most trailers have to be a minimum of 7' high to allow this. A 7 1/2' high trailer usually ensures an adequate head room. Because most brands are not built to the same specs, it is wise to actually try the space during your initial inspection.

Best of luck.