I agree with both of the other post, coverage and depth. However, depending on where you hunt conditions can come into play that can make using the large coil tough sometimes, to the point that it can either lose its effectiveness or drain you physically. A harness can and does help in many situations but when the currents are stiff and swirling and the bottom is uneven then things can sometimes turn the other way, the increased control and sensitivity of the smaller coil holding the advantage. Noway can I use my larger coil on iron infested beaches, as they can quickly turn that way sometimes in certain areas after periods of strong tides, etc. I am a HUGE advocate of retaining the ability to change coils when needed.
