I USED to use the larger hooks for steelhead. I found that when I went to a double #4 rig, 'bout the only way a fish was getting off was to break it. With the smaller hooks they will almost always get a deeper set with a lot less energy. I think that you'll find that the smaller hooks being that they are a finer diameter, will bury all the way with a lot less energy. Meaning that the ones that just bairly mouth it, will stand a better chance of getting hooked. You are trying to drive a lot less metal through a jaw. Just my .02 cents.

Tim