Ive got both, and like both. The Selway is a bit larger overall in both hood and arrow pattern. Both are very well made, the Kanati looks to have a bit more handwork. Something about the Rawhide on the Selway I really like not sure why but I do.
If I were going to pick between the 2 and was concerned with having a compact hunting package I would go with the Kanati. If size was no concern then its a toss up.
All that said, my absolute favourite quiver is still the good ole' Great Northern.