what if any are the differences between the 1198hdsi head unit and the 1158hddi ?
processor? options?
in other words do the head units basically function the same?
.........if i added my spare HDSI transducer to an 1158 HD unit would it function same as a1198HDsi
and the appropriate menus appear on head unit ??
ia ask as the 1158 is considerably cheaper..
ds