In my mind, You should have one of each, same with any lipless crankbait, I always mix a one knocker or the 2 tap when fishing the Red Eye shad & lately I think I catch better fish in the 2 Tap. I have only been fishing it for a few months, but I prefer it over the other one knockers I own. I throw Traps at offshore weeds all year long, the Original Red eye shad is maybe the best lipless bait on the fall, but the 2 tap will usually get me extra fish if I go through an area with an identical loud version & then start throwing the 2 tap.
I would say they are both equal, but I think I like the 2 tap better than other one knockers even the silent traps because it sounds unique, Bass see thousands of lipless cranks and everyone fishes the same ones for the most part. The different sound with Strike Kings colors seem to pull a few fish that wouldn't touch the standard and sometimes the other way around.
I have been messing around with different models, sounds, sizes for years to try and figure out why some guys pay $15 for certain baits, and I noticed a few years ago that often the baits with a deeper rattling or sound produce better.
For example, I love the Yo-zuri Vibe which has a high pitch, and usually I catch good numbers when I throw it, but I never catch bigger fish (Could just be me) but if I switch up to a different sound same color, size etc..I find more often than not I will find a few bigger fish in same area.
When fishing a trap on calm quiet days, I believe the one knocker's and deeper sounding not as much of a ruckus produces for me much more often. I love both baits, But I plan on buying some more 2 taps since the flat out work, plus for the price, and stock hooks, hard to beat the price...I would buy one, you won't regret it, I also like to always have a smaller trap and larger trap to fish the same used water. Hope that helps. For stained water I absolutely love that sexy gold color, in both versions, the Neon Bluegill for stained or deeper water also seems to be one of my confidence colors. But siver blue or anything white will always work in any lake.