I owned the Outback prior to my Switchback. It is a very nice bow, quiet, plenty fast, smooth and shock free. That being said, the differences between the Outback and Switchback are night and day. There really isn't much of a difference in the shock, vibration and overall quietness of the 2 bows, they are both that nice, however, the Switchback is 100 times smoother than the Outback and it's a little faster. Also, it seems like it is easier to hold steady because of the little extra ATA. My biggest complaint about the Outback is if you creep just a hair, be it from fatigue, an itch, whatever, the string wants to rip your arm out of its socket, if you creep a hair with the Switchback, nothing.
Both bows are top notch performers and you won't go wrong with either one, however, I would definitely choose the Switchie if I were you :wink: