CZ6 vs CZ3D

Is there a difference between these two models. I was thinking of buying one if there is a major difference...

CZ6 has different cable connector than all the other CZ's, so finding additional coils is an adventure.

Performance wise, a properly tuned 3D in enhanced mode, hunting older sites for older coins, will bring more of those coins into the high tone response, where some of them may have a mid tone response on the CZ6.

Both work very well in wet, salt sand.

I would go the 3D route for the 4 tones, easier ability to get coils and the enhanced mode option.

I think the CZ7a Pro, is just as good as the CZ3d. They hunt about the same, and have good depth.

Prefer the cz6a over all others myself (for land use) b/c it's splash proof (no speaker)

cz20 for under water