Really comes down to a preference. Some people love the features on Ulterras while others hate losing the touch of the cable control. I have the Terrova and love it. Eventually, I'd like to upgrade to the Ulterra. It does take some getting used to but I can control mine better than I ever have been able to a cable control plus I can do it from anywhere in the boat. It really let me stop fighting with boat control and concentrate on fishing. I have a small boat so it can get pushed around in open water when it is rough. I never fished deep water because it was just a PIA to stay where I wanted and retie lures, etc. Now, as long as I'm not taking water over the bow, I'll fish anywhere on the lake and not think twice about it and enjoy doing it.
I've already decided that I'll never own another boat without an Ulterra