Nope. Shimano sponsored teams without a separate bar/stem deal get Pro, the house brand of Shimano Europe. Vision is a department of FSA, under the Tien Hsin umbrella.
Yes, you're right, the last one he used must be a Most (Pinarello inhouse brand) prototype, based on the Vision Metron 5D as he was using them in Rio 2016 as we can see on this picture.
Nope. Shimano sponsored teams without a separate bar/stem deal get Pro, the house brand of Shimano Europe. Vision is a department of FSA, under the Tien Hsin umbrella.