It's very close, the 5x 3bet makes him less likely to be a reg. But the small 3bet means he likes his hand and isn't folding.

Against 55/22/AJ/A4dd/A3dd/A2dd we have 54% assuming he would 3bet QQ/JJ pre. Seems to all depend on if he takes this line with AJ.

I think folding/stacking off are very close in EV.