The top photo is Hoya aff. serpens (Xiaojie 001) and the bottom photo is of the regular Hoya serpens that has been in the trade for decades. The regular serpens is far more pubescent with a heavy green tinge to the flowers; it also has a wonderful scent. Hoya aff. serpens (Xiaojie 001) is not nearly as pubescent, the flowers have a pink tinge to the corolla, and there is little to no scent.