Yes, if you're running & gunning with LMGs. When I use an LMG, I may end up doing a little RnG, but that's not my focus. For me, LMGs are about holding down a route or area. You can definitely use them to RnG, but I do better with them when I use them for a special purpose.
IMO...they are both lame
but the thing with dual band is there is still a chance u might not correctly identify the target at long range. for example if only a small portion of the player is visible...(something like a foot)...as opposed to a target finder which will put a red square around that too...
Another thing i dont agree is it wont help u be on target...as the attachement says. It allows u to locate the target (hence the name target finder). Im sure u agree that locating the target earlier will help u put more bullets into a target...which will help u win that particular gunfight (if u call shooting some one from an obscure corner of the map lying down and waiting a gunfight)