When you go to Perf Bulletins, you are offered 4 choices (tech, HP range, type of boat, brand). Click on "All" for all choices except brand of boat, click on Parker Marine.
There's the 23CCDV and 23DVWA w/225-4's listed. To get performance bulletins with 250-4's, guess you'll need to contact Parker. If you get one on the 250-4, you could post the differences here. There is a member here "grouperjim" who has a 250-4 on a 23DV cabin Parker. You could "search" or PM him.