I have Golden Russet from Cummins and it is definitely not the same as my graft of American Golden Russet aka Bullock. I have read many conflicting opinions on how sour Golden Russet is and I expect it is based on the conditions they are grown in. In theory there could be some mix-up, but no picture has confirmed any to me. AGR is more like brass in color whereas (E)GR is a strong yellow on the non-russet parts, and further south like where I am it has little russet compared to AGR.