The correct outcome would be OFFINABUS and AAA
Don't like the term 'selling' personally. Don't think there's anything to sell here anyway. A fairly tame reaction to totally unacceptable behaviour
You have to sell everything these days. Even the most egregious offences.
I dont see how grabbing your opponent around the throat can be described as anything other than brutality. I think it's a tough sell, because it can be downplayed, and at the lower end of the threshold for brutality. The force wasn't really a lot, he didn't really choke him, he didn't hold him around the throat for very long and other reasons I'm sure... But ultimately, taking your opponent by the throat is not an attitude a la AAA it's an action, and to me it's a violent action.
I think in these situations, exceptional cases exempted, you ideally want 2 of the same sanctions for match control purposes.
I think you'd have a hard time explaining why you sent off for a, what many will say was harmless - it is not, kiss and not for a very clear grabbing of the throat.
If you have this in your game with an observer, you have choices, each need selling in a variety of guises.
1 is, imo, correct outcome of 2 reds. Observer mark in bag, probably 2 disgruntled club marks.
1 is one yellow, one red. Maybe a happy observer. maybe it's me and I disagree. One peed off club and one mildly happier.
Yellow a piece, the worst option, maybe mildly happier clubs, maybe not happy as VC or Offinabus ignored against them. Difficult to explain to an observer what you saw and then marry up the sanction.
Final option , risk clubs, but at our level, less likely camera picks up what actually happened, downplay it totally and again get observer support.
All obviously carry the risk that observer/clubs disagree whatever action you take so you've always got to sell, even when you're right.