Yes, Mt. Wilson is part of the same San Gabriel range where 107.1 transmits from. But the Mt. Wilson transmitters are many miles away from (and thousands of feet higher than) the 107.1 antenna.Yet when 107.1 had a "casualty" at its location on the slope up to the Mt Wilson peak, it operated from the "Wilson" site with reduced power for a while. Of course, keep in mind that that whole mountain range is a series of relatively small humps and peaks... or terrain variations... which have been given their own name.
My "own" mountain is indistinguishable from surrounding ones except for some lower points in a long ridge.
https://www.summitpost.org/mount-gleason/304677
Again, please name at least one site in California where two Class B's at essentially the same location have less than a four-channel separation. Just to bring this topic back to San Diego, that's why I don't think KGB/101.5 and KLVJ/102.1 can transmit from the same place.