If you are like me; you will probably tow your boat less often than you intend. I have had a RAM with the tow mirrors before. My current RAM does not have the tow mirrors. Personally, I see no advantage to the tow mirrors unless you are towing a HUGE trailer regularly. The standard non-towing power folding mirrors do great when towing my 18 foot bass boat; I have no issues seeing the entire trailer and its surroundings. The power folding mirrors have a rather large blind spot mirror added to them; which makes it even easier. In addition, you can select the backup camera to "on" if you need a good look at your boat and trailer. The towing mirrors are giant and look out of place on a 1500 (to me).
I also love the power folding option of the standard mirrors because all it takes is the touch of a button to fold them in. These trucks are pretty wide; so I often use the power folding option when parking. Getting out to fold the mirrors manually is something that I just do not want to do.
I suppose it is a personal preference and there are people that would argue both ways. I do tow a boat and a utility trailer with my RAM (power folding mirrors) and do not miss the enormous towing mirrors that my old RAM had.