I would guess all the bidders have a concept art like that. I would not read anything more into it than that. I don't know if Amtraks relationship with Siemans is cushy or not but the winning bidder won't win the the bid without meeting the specifications. They may have to be the low bidder meeting the specs, but I don't know if Amtrak has any discretion on that.New Velaro Acela concept art from Siemens... seems like they're confident they'll get the order, given their currently cushy relationship with Amtrak:
Probably some strong candidates for the new Acela Train-sets:
1. Siemens Velaro
2. Alstom AGV.
3. Kawasaki EfSET (Environmentally Friendly Super Express Train).
4. Bombardier Zefiro (although Bombardier is no longer involved in the process).