imo the difference between great players and ubersharks is a situation like this.

i m not just saying this to kiss bill's ass btw

given the read (villain tight post-flop w 36/2 stats), Ax of hearts seems to be the most likely holding... and it's not even close imo.

If there were meta-game issues (Hero pushing him around, him suffering a beat etc.) I think it's a call but if this hand is just another among lots of "ordinary" hands I think Hero saved a lot of chips on the river and is trailing more than 2/3 the time.