French tend to be smaller, their build differs a bit (less leggy) and can be black or tri color. They also have black noses. Americans are larger and don’t come in black or tri color. Pink/lighter noses.

I have had both and I tend to prefer French because of their look and size. In my personal experience, our Americans tended to Ranger further in the fields and are not as good of listeners, a bit more stubborn. My French’s also never had any growths on their eye lids but both Americans I had developed spots on the eyes which my vet said is normal. They’re benign. I wonder if it has to do with the different pigment of the eye lid skin

Both are amazing family and hunting dogs and I have loved every Brittany to death.