I think both would be fine in hairy seas, the bigger the better of course. The Highfield is pretty light, not sure of the weight on the 25' rib but something heaver should ride better. I had a 20' RIB that weighed 800lbs then had another 20' RIB that weighed 1500 lbs. The extra weight felt a little better.
The flat bottom end of that 25' looks just the Safeboat 250. I think a few users here mentioned that a 733 rides a lot better than the Safeboat.
I would say just wait for a 733 if that's what you really want, one will pop up soon and you will definitely be able to get one for less than what you will pay for one of those two ribs. If you find one on the west coast I can check it out for you. I would even bring it to WA for you if you let me joy ride it for a day down here
I have a 22' Hurricane that will be on the market soon too, for something around 1/3 of that price. Good to see some Alaskan Ribbers by the way, I just sold my SR6 to someone not too far from you.