I bought both at full price, as this group buy was over long before I planned to go to last year's LSRR.
It should be worth noting, that while the NightStalker Tribal Whip has significantly fewer LEDs and is not as bright, it is nearly 50 dollars cheaper than the Safe-Glo. I paid 94 and change shipped for a 6' NightStalker with the Quick Disconnect, my total from Safe-Glo was just over 140 shipped with the "not so quick" disconnect and recommended inline fuse.
I did not like the Safe-Glo's wiring layout. First off they don't use a dedicated ground, it relies on the connection to the grab bar. Second the "quick disconnect" is just a threaded hole which still requires the use of a wrench to tighten down. I thought you could tighten it down by hand, it worked it's way loose enough to wobble in the threaded piece on the grab bar, bound up and was, at the end of my first weekend with it, useless. Third, the RCA connector in the bottom of the "quick disconnect" is pointed upwards, open to dirt, sand, and water to fall into the top of the piece when the flag is not installed. I used a plastic cap I found to counter this. Last, the quick disconnect is an RCA connector plugged into the bottom for power. This means there is a wire always hanging from the disconnect mounted on the grab bar to the tail section where you wire the power in. If you follow their directions it's a permanent connection, I installed a plug when I wired it.
Overall, I much prefer the Nightstalker Tribal Whip in terms of functional design, I just wish it had more LEDs. If I ever need/want to buy an additional one, I will still shop around however.