They are not the same! I wondered this too, google it. The GK Silver Flame is actually an interesting story. I recently picked up some ABS heads, they look great to me but just the same I have no doubts that there is a very real difference to the educated and discerning craftsman... ie where are the parts and componets actually made?!
From what I could gather Markus Gross engineered the Silver Flame broadheads and founded GERMAN KINETICS. look that up, it was very interesting to me.