I did not vote because I have not shot a deer yet with the G.R., however I plan to try them this year along with a couple of other heads in my quiver. That being said, I have had great success with the Tekan II head. Between a couple of buddies and brother in laws, we have killed many bucks and does with these heads. They fly awesome and penetrate extremly well. Just my 2 cents.
Between the 2 I would choose the Tekans for 2 reasons……
1.) Solid steel design.
2.) The Reapers have too many moving parts (springs, collars, washers) and are just an overall PITA in my opinion. I know they work, I know guys swear by them, but after 2 weeks of toying with them I just don’t like the design. I like how the blades are set back from the tip but other than that not much left an impression on me.