I am willing to bet that your old 19' CC is a lot lighter and a shallower V with less deadrise that the Grady. I am sure it will be night an day. I agree with Bryan focus on the intervals more than the wave height. I doubt that that Grady will have too many problems in So Cal waters provided you use common sense.
** just noticed that you are in Maine and not So Cal. In that case I would dump that boat right away! They are horrible on east coast waters, and the resale of those Gradys completely suck on the east coast. Me being a nice guy I will take your boat off your hands at let say .10 on the dollar? I'll even meet you have way for pick up.
No really congrats on a great boat!