I think that the best value is the $1800 Diverge Comp E5. It has the same carbon fork, future shock, Axis wheelset and 105 components as the $3000 Diverge Comp with the carbon frame.
A $1200 premium is a big bump just to get a carbon frame, because Specialized is pretty adept at building great aluminum frames. The carbon frame, can't be that special; but it is a bit larger than the E5 aluminum version, since the geometries are not identical
Attached is the diagram of the largest 64cm frame sizes from
Stack and reach calculator (with the Sequoia as a comparison).
$1800 Diverge Comp E5
https://www.specialized.com/us/en/me...ecompe5/128909
$3000 Diverge Comp
https://www.specialized.com/us/en/me...rgecomp/129079