FWIW, I see the Spec. flat-bar Diverge and Sirrus X as very different. The former strikes me as much closer to, and derived from, current 29er hardtails in its geometry. If one wanted a dedicated 'rigid' 29er to ride gravel and singletrack it would make a lot of sense.
The Sirrus X strikes me as a flat-bar version of current 'gravel/road' bikes: effectively, a dedicated flat-bar version of a drop-bar Diverge, if you like. I switch out my tires between 'gravel' and 'road' on occasion (38s to 32s and back).
I don't get on well with drop-bars, so I'm perfectly happy on this bike on paved/gravel/dirt roads, and on non-technical singletrack. I'm too old and infirm to venture onto the tricky stuff any longer. Oh ... and I like the FS (mine was upgraded to 2.0). It does exactly what Spec. claims it does.
