I dont like 4betting preflop if v2 is accurate to your description. I think he is 3betting for value rather than some sort of play in position so I'm giving him a preflop range of TT+,AQ+ (if he is infact tight and straight forward). I think v1 can have a huge range of suited connectors/broadway cards/pocket pairs.

I dont think a 4bet gets enough folds from V2 so i'd rather call pre.

I think with the flop we are ahead of v1. I think v1 is most likely to have a 9 but I also think he can have alot of draws that we are ahead of as well as underpairs. I think v2 has an overpair. Based on the description I dont think he cbets AQ/AK(if hes even in there with AQ). I think if he's capable of folding an overpair then jamming here is best but if you dont think that is possible then call.

I think im check/calling 100% of turns regardless of the card. if we check and v2 jams and v1 calls we're getting 3-1 and I think thats the correct price against JJ+. If v2 jams and v1 calls we're getting 4-1 and I think that's the correct price.