The fallfish I've caught have a more distinct scale pattern and more of a silver coloration. Years ago fishing a stream in NE Pennsylvania we would catch fallfish up to 18 inches. Good fighters and would readily take our trout lures.
We fished a beautiful stream that fed a large pocono lake. The man who owned this land referred to them as whitefish and preferred them to trout on the table. I have to believe his recipe dissolved the many bones of this largest of Pennsylvania's native minnows.
On a canoe trip through Algonquin I caught a number of similar large minnows (12 inches+) that would readily hit jigs.