this is out of bowhunt america magazine.......both bows 29 inch draw and set at 70 pounds..... both with prong type arrow rest.
1st bow is the outback
w/491gr arrow 255fps w/ kenetic energy of 70.0
w/428gr arrow 273fps w/ ke of 70.8
w/416gr arrow 276fps w/ ke of 70.4
w/412gr arrow 277fps w/ ke of 70.2
w/411gr arrwo 277fps w/ ke of 70.0
w/385gr arrwo 284fps w/ ke of 69.0
w/378gr arrow 287fps w/ ke of 69.1
w/305gr arrow 312fps w/ ke of 65.9
2nd bow is the liberty
w/491gr arrow 247fps w/ ke of 66.5
w/428gr arrow 263fps w/ ke of 65.7
w/416gr arrow 267fps w/ ke of 65.9
w/412gr arrwo 268fps w/ ke of 65.7
w/411gr arrow 268fps w/ ke of 65.6
w/385gr arrwo 276fps w/ ke of 65.1
w/278gr arrwo 278fps w/ ke of 64.9
w/305gr arrwo 302fps w/ ke of 61.8

based on this bow report the outback is faster and carrys more kenetic energy the liberty. i think you proshop guy was a little off. i own a outback and love it. but that is my preference. and my opionion that the outback is better.