The only extras that will be included will be tires, they are on yellow rims and are the ones mentioned above. they have plenty of wear left in them.
the AE diff is made up of b3 outdrives, b3 diff rings, associated washer/thrust and the losi diff gear. there is a bushing that goes over the outdrive and then fits in the bearing and can be seen in the pictures. The AE diff helps to reduce rotating mass and increase corner speed. more info can be read about it in the xxx cr thread here on rctech.