FR will likely tell you that it was a rolling change on the production line to a new supplier / vendor / whatever...
On the back page of their brochure it states:
"All information contained in this brochure is believed to be accurate at the time of publication. However, during the model year, it may be necessary to make revisions and Forest River, Inc., reserves the right to make all such changes without notice, including prices, colors, materials, equipment and specifications as well as the addition of new models and the discontinuance of models shown in this brochure. Therefore, please consult with your Forest River dealer and confirm the existence of any materials, design or specifications that are material to your purchase decision."
Those "weasel words" allow for just about any substitution they may want to make. In our case after
we placed our order for our GTS they quit installing the nice Dometic Model 310 porcelain toilet and went with a cheaper plastic toilet. When I pointed this out our dealer installed a new 310 at no cost.