IDK my unit is 93sv Garmin that has the GT ducer--dedicated down crystal. I am pretty happy with what I have seen on mine. However, over on BBC garmin Forum there are a lot of conversations going on about the CV ducers and the using of SV signals to create the dv images. Lot of guys are not happy. Do they have a valid point? Again. IDK I have nothing to compare to. I am suspect of Lowrance's ad but who knows. HB used a similar (but more inclusive) method of dv for several years but I have heard that they, along with Raymarine, have bit the bullet and are going to pay Lowrance for the rights to use. Garmin doesn't appear to be on board yet. I don't know that my sv and/or dv were ever as good as a friend's Lowrance. Still I like what I have and what I get from it. Learned world's of stuff. The price was about half of his, and the company has a policy or flat-rate repairing for long long time. Not way high costs after warranty and see ya later after a few. Do some more research and get what will make you happy. Rickie has some insight on this.