I think each has a place, the Glo-toob is much smaller and depending upon the color and model (I have the original - just on or off) has the potential for acting as a flasher (newer model). I like the Krills, (somewhat for the cool factor), but like the fact I can use standard AA or AAA (I have some of the newer AAA's) batteries. The light from the Krills is somewhat softer and feel they may affect night vision less than the Glo-toob, but that is just an opinion. The Krills are also cheaper to buy. Pete