First of all, I never owned or tried the F-70 because I've always had the F-75's and T-2's all along. As you probably know, those three all run on the higher frequency while the Omega, its two siblings, and the F-5 run on a lower frequency.Talking in broad generalities, I think your statement around those particular comparisons is pretty much correct and as such, I'd deduce the F-70 and Omega are in the same depth "league". I know I've seen at least equal depths ON COINS between the T-2 and Omega but the Omega has the more pleasing and discernible (to me) audio response. Just remember, results may vary due to different experience levels and or conditions.