To the best of my knowledge, there are no members here who currently own a Roo/Shamrock 23RS and who would be able to provide you with information about it so that you can make a comparison. There are, however, a number of Outback owners on here but not sure if there any owners of that particular model.
Is there something specific you are looking for or are you interested in getting some general comments about the Outback?
Welcome, BTW, to the forum!
2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax