The two on my boat are not the same. Seems the one on the console goes out quicker than the one on the front. I usually purchase a new 'better' one when the console goes out then switch the front one to the console. I like the newest technology on the front for trolling as most of my console searching is for depth and structure and not specific details. JMHO.
ps: my front one now is a 320 and I just love it.