The CZ is not a wiggle/waggle machine. It's pretty much sweep and if it's repeatable from a few angles, dig it.
I used both a Sov GT and my CZ6a at the beach yesterday. Sov had the 10 inch coil, CZ6a the 8 inch. Found targets with both of them. The thing with the Sov Gt, for me is, I have not had enough time on it. I have to get used to the threshold and how the unit tells me it's running hot. I chased a few ghosts with it yesterday where I never do with my CZ. It's only because I know the false signals the CZ is giving me and can run it hot, whereas with the Sov GT, I can't right now. My hunting partner Matt uses his GT almost exclusively with the 10x12 and 12x15 SEF coils and does very, very well with it. He tried a CZ21 with an 8 inch coil and you should have seen the look on his face when he was using it. Since he is so used to threshold based units and his Minelabs with the bigger coils, he sold it to Dig ! I think he had exactly 10 minutes of use time on that thing.
I think above all else, the main difference is the silent search vs threshold based between the CZ and GT. If a person has been using one or the other for a very long time, it is hard to switch and feel comfortable right away. It takes time. I know there is a silent search option on the GT, but I think that defeats the purpose and running it that way is not optimal on the GT.
The fainter threshold breaking targets were only on fringe and small targets. The GT clearly hit hard ( ie, definitive tone) on coins and such...it was small pieces of aluminum, fishing swivels, etc. that I dug that sometimes gave the same sound as a false, which made me dig a few ghosts. I also think there may have been either really deep iron or the salinity of the water making the unit act that way in addition to me running the sensitivity higher than I should have.
Hopefully the next time there is another Jersey shore film session, I can be there with a few other units. One thing I would love to do, is find targets in the wet sand ( whatever they may be), mark them, and have other units go over them and see what they ID as or what we think the target will be prior to it being dug up. Especially deep targets on the fringe. It's pretty easy to guess a 3 inch nickel or 5 inch quarter. It's the 12 inch+, lower conductive targets that we are after, ie bigger gold rings, as well as the smaller gold in the 5-8 inch range, and it would be interesting to see how different the units sound off on them.