Wow...
1. Going Bs to Gs won't necessarily make you a better co-pilot. In Bs its not uncommon to have to wait until every third flight, or every other flight, to even fill the ECMO 1 (front right seat) role. As opposed to doing it every single flight in the G...and you'll be leading the section on most every flight. The side by side seating arrangement in the B can be great. Also great is being able to do a left hand co-altitude rendevous, and having radar SA to other players in the air. And not having 4 competing voices at times during a flight.
2. The G has the best radar in the world and the ability to defend itself...so yeah, it kind of makes sense to train to it. G crews also get sent to EW training ranges for their graduation events, and use the training resources in Whidbey all throughout the AEA phase. The G does more dedicated AEA flights than the B side does, but lets continue to $hit on them for also training to A/A, and doing stupid crap like memorizing time-lines that they need to employ.
3. Those fancy buttons make it a hell of a lot easier to do a better job at the primary SEAD mission. The system is good, and works well, and the aircrew interface is stellar.
4. The B is in the fight every day, and doing a kick-ass and very important job. The G will in all likelihood be there before you even get through the RAG. It ain't a F-22; it won't get held in reserve as it has a mission that needs doing.
5. You aren't guaranteed to transition in a year or two; depending on what squadron you go to, you could miss it altogether.
Look, VAQ is a great community, and you'll be happy in either platform. However, I'll take a newer jet with a newer system that has a higher FMC rate any day. Yeah, you can't pass a hand signal in a Growler; you can't lock up the tanker on a $hitty night, or look at the flight line and know that every signal jet has MIDs, a great AEA system, is plumbed for both forward and aft JHMCs and has a 7.5 G limit in a Prowler. The only structural advantages the Prowler has over the Growler is slightly better endurance, better ability to punch through icing and a piss tube. Going on the road with 4 dudes is also a good deal; just means that you need to go as a section in a G.