I thought the ultralight worked well for me, but with heavier weight the frame kept sliding down my back. I changed back to the composite stays and everything is great.
Go with the hunting frame with your choice of stays then add the arrow stays for $10 extra. Then you'll have the ultralight too with an at home stay swap.
Yes, the frames are the same, the only difference is the stays. Like dunner says above, buy the Hunter frame and have them throw in the arrow stays for $10. Done deal and it only cost $10 to see which you like better.