I already stated previously... I'll state differently
Take the GW. Cruise is a bit under 30 mph. Just above 2mpg. Outboards blow for watersports (torque is not existent... ..300 hp is not all the same, you have to factor torque especially in a boat! Look at ski boats and they promote torque at a low rpm). They aren't great for fishing, in all but center console setups, and even then it's not great. Straight bottom.... Straight from the Wynn design that aronow made famous in the 60s MINUS the 24 degree dead rise that made the ride great.
Pretty fast? I'm looking at 50++ foot convertibles that cruise faster. My current boat cruises slow at 45... Mid cruise 50, fast cruise 55. I get 3.5 MPG. You have long runs there where that means a lot. From a $$$$ aspect... It's about 30 miles from sat beach to Sebastian. You can run 29 mph in that Grady at 2.2 MPG. Takes an hour and a half contending with idle zones. Costs about 75 bucks round trip at 2.50 a gallon. Same trip takes a bigger, much better riding, twin step under an hour and only 43 bucks in gas.
Also... There are a few sub 25 foot boats that are designed for offshore. Neither of the ones you posted are close to being one. They are both inshore designs to be taken offshore on only the best of days hoping it ends well.