we have both a Bullseye and a Vibra-Probe ... the Vibra-Probe would be somewhat more uncomfortable to carry around in a back pocket .... I believe it is built stronger than the Bullseye and it does have a belt sheath available that I've found works well .... the Bullseye will pick up a target at a bit longer distance than the Vibra-Probe and can be used in sound or vibration mode, it also has a small light aimed at the end of its pointer ... the Bullseye would fit easier into a back pocket but you'd sure have to be careful about not sitting down with it in your pocket .... having used both, they both work really well, my personal preference is for the Probe while my wife prefers the Bullseye
Jim