I think they're the same tree also. Just easier to call it - or type it - Franklin.
As I understand FB, it's a bacterial disease that spreads through contact from other infected plants. Birds are a common disease vector, and so can bugs of any sort that can fly from plant to plant. From all I've read, blossom time is when it usually starts to infect plants, and more so when rainy, windy weather lashes the hell out of trees in bloom.
Does anyone have pear trees near their Franklins, or other apple trees?? Pears are notorious for getting FB. I had an ornamental pear in my back yard that got FB most years - and I cut it down. It's replaced by a "Sugar Tyme" DR crab apple tree.