I'm 1m92 with an inseam of 88cm. I have a Carbonda CFR707 XL which I run with a 90mm stem, with which I'm very happy. I based my choice on my Canyon Ultimate CF SL 8 that I also own in an XL size. Geometry between these two bikes is quite
comparable.
I made
a post describing my full build over on fiets.nl.
When I compare the CFR707 geometry with that of your Factor Ostro VAM size 61, then I notice that the
geometry of the CFR707 XL is much closer than that of the
XXL size.
I have my seatpost inserted up to the 5.5 mark. So I guess you could extend it for another 5.5cm to compensate for your longer inseam.