i have both….and the two dont compare in shallow water. plus, the troll motor mount lets you look straight down, not 3-4 feet behind you. if you had the factory install a glassed-in transducer, just leave it (you aint gettin that sucker off) as a spare. i mistakenly pulled the wire for the factory installed out of the recess area and back to the transducer. next trip out, i broke my trolling motor puck off on a tree. ironically, i was wishing i had left the wiring alone, because i could have used it as an emergency spare. regardless, mount that thing on the trolling motor!