Sarajevo!
I chose Sarajevo, because I am more familiar with that type of ottoman architecture. As far as I have seen, The Ottoman architecture in Sarajevo, reflects the type of architecture in most of north-central Bosnia. Mostar represents Herzegovina. I find Sarajevo as a whole, a much more vibrant, and beautiful city. Sarajevo's blend of east and west overshadows Mostars Ottoman beauty. So, my choice is of course Sarajevo.
But I have to show this photo of Mostar, taken in the late 1980's.
Edited by YuGo