While looking for an Ultegra Di2 disk bike, I cross shopped the Ultimate and the Tarmac. I found the Canyon to be considerably less expensive.

https://www.canyon.com/en-us/road/ul...x-disc-8-0-di2

https://www.specialized.com/us/en/me...=263509-154559


The Di2 Ultimate is actually cheaper than the mechanical Tarmac.

https://www.specialized.com/us/en/me...=263506-154558