[walrus]

Jim Day said; Greenbacks are faster and have more flash, Spanish are heartier and last longer on the hook. Greenbacks have to be constantly swimming to breath, Spanish can sit still in your tank, and be fine. I've caught yellows on both, but nothing get's bit quicker when things are hot then a lively lit up greenback. Flyline I prefer greenbacks, halibut I prefer greenbacks, or fast bites I prefer greenbacks on the loop, but for dropper loop fishing when things are slow I prefer spanish because the live longer on a dropper loop rigs. One thing to note. On a Carolina rig, or halibut rig a greenback will swim around and stay off the bottom, untill it wears itself out and dies. A Spanish will hug the bottom and hide, for that reason sometimes spanish are better on a dropper loop the a carolina unless you are on clean sand.

That explains why I never caught a fish off the bottom using a greenback, but have on spanish. I love this site it continually helps me get better.