You can buy frame set (frame, fork,neck, handle bars and seat posts) for both the Sequoia and Diverge (see below)
https://www.specialized.com/us/en/bi...-module/116172
I just found out about Compass tires. I am planning a century ride for September. It is in Delaware so it's flat and on asphalt ( different than what I usually ride). I like to build another set of wheels with thinner tires built more for road riding.