We've done some conparisons that are trying to be rational like this one . The horizontal distance limitation is the performance of the UTP cables. Every closet has a hub, which requires space, power, UPS and installation.
Most closets have punchdowns, patchpanels and other passive hardware too.
The backbone connects all the hubs to a central communications facility, usually called a main telecom closet, where the complete LAN is managed. That is a totally erroneous comparison, because with fiber you aren't limited to 90 meters. You don't need a hub, power and backup power for the hub, a separate data ground, racks and space for all that or installation and maintenance labor. What most people overlook is the cost of the wiring closet. These costs generally exceed the extra cost of fiber equipment in a centralized fiber architecture.