I need to know how exactly (or close to) is the Blue Angels variation different to the deployed fighting Hornets please.
JIMI is just the guy you need to ask about most of these questions. I'm guessing other than that they USED TO fly Alphas but now fly the Charlies, the main differences would be the slick paint, smoke generator, and the internals (modified pumps for longer inverted flight time; cockpit stopwatch/clock; cockpit panel shroud switches/gauges). The VBA internal model pic shows the stopwatch and the switches on the panel shroud.
Like, If the guns were removed, are the gun/exhaust holes covered? a good quality photo might help a lot too. These type of things.
The Hornet pic should tell all the answers... yes, the gun and vent holes are covered up and painted over.