Cervelo used to have a doc on their website called something like 'Four and a half questions about saddles.' Their rule of thumb was that the saddle should be about 20 mm wider than the sitbones measurement. Most of us ride road bikes on our pubic rami because one usually has to lean forward to reach the handlebars, and those get narrower as they approach the pubic bone. Also, most men have sitbone widths of 100-140 mm, so 145 is unusual.

Probably doesn't matter much. The important thing is to get a saddle that seems to disappear (or at least doesn't cause pain), and that's mainly a matter of discarding options. Using width as a qualifying/disqualifying factor probably works better than most.