Minnie Winnie Towables

I see that this topic has slowed a bit so I thought I would jump in. We ordered our 2101DS in early February and took delivery in March. We wanted a white one and they had a white on the assembly line in Indiana. We picked our colors (Java) and had a rear ladder installed at the factory. This is our first trailer and I am very impressed with the quality and believe me I have been all through it. We went on one camping trip for 3 days just to check it out. All went very well. Shortly we are going to the Texas coast for fun in the sun. Wish the holding tanks were larger but we will be getting full hookups where possible. Can anyone tell me the difference between a 2101DS and a 2101FBS?
I am using the Reese WDH and Reese sway control. The RAM truck with the Pentastar V6 and 8 speed transmission pulls it very well.