You could say they were #1 and #1A. But I don't think they ever supplanted the Genovese over all.
What I've read in you're other posts is very convincing. I don't think the Gambino's ever 'supplanted' the Genovese, but I really think that from the mid 1960s to the mid 1970s the Gambinos were as powerful as the Genoveses, and because they had the most powerful boss they may have had a slight edge.
If the difference was as minor as the #1 and #1a you state it's as good as impossible to actually measure the difference in power.
"It was between the brothers Kay -- I had nothing to do with it."
