Normally airline retirees are the safer bizjet pilots because they follow normally the rules a touch more to the point which is not a bad thing in terms of safety. Of course that pisses of the client. But normally I ask them(after I divert) what they prefer - being dead at the (or close to) planned destination or safe and well at the alternate and then driving save wherever they want. Never got a bad reply on that.
And yes, most bizjets are CAT I only because of the costs for aircraft and plus additional crew training(and keep them current).
I used to fly the same type of AC in airline ops as I do now for a huge bizjet operator, airline was CATIIIA with HUGS and now we are back in the stone age with CATI only.
We have as well Globals(with their tinly little cargo hold, lol)and as well they are CATI only. Not so premium anymore when it comes to bad weather OPS.
Sometimes first class major airline might be the better choice
