The main criterion that you should use (to decide btwn open or open shove) imo is $EV. Obv, the ICM math requires FGS so unless you're gonna be playing a decent amt of MTTs, you may have to evaluate other variables in order to make your decision.
If you're serious about MTTs, then you should look at some ICM sims. I used the HoldemResources Calculator and ran a sim with the (limited*) info that you provided in your OP. AQo is very close in $EV (see below.)
Open:
Open Shove:
* if you want an accurate sim, I would need the payouts (1-11) and the stacks at both tables. I used the 1st place prize to determine payouts (using a std percentage ladder.) I gave random stacks to players, with the average stacks being ~20bbs.
Here are a few relevant variables to consider:
- Do I want to play a mixed-strat.
- What are the stacks at the table and how they are distributed.
- How valuable is having a reshove stack.
I don't think it's debatable that the decision to both Open and Open-Shove in this spot is the optimal strategy. The question is how to distribute our combos into both actions. As my sim demonstrates, the $EV in very close for most combos in your ranges, so it may not matter much which
initial action that you choose. That said, problems and errors can arise in subsequent actions/decisions that may make Opening problematic. For example (using the ICM model and assuming that your opponents are playing optimally) AQo is a fold to a reshove.
Are there reshove (12-20bb) stacks and are they in LP? The most favorable scenario to Open from UTG 6-handed would be having the big stacks in MP and CO, then the small/reshove stacks OTB and in the blinds.
With 12bbs, you have FE on your reshoves right now but being UTG, you will lose most of it just by going thru the blinds. Getting an open shove thru will give you 14bbs, allowing you to maintain your reshove stack after moving thru the blinds. I would assign more value to having a reshove stack in there was an aggro big stack on your right and smaller stacks on your left. In this scenario, I would tend to pass on higher variance plays (like inducing with non-nut combos) and take any opportunity to open shove and maintain FE on my reshoves.