When I first read this I was like, "shoveling all day long here" but it's actually a lot closer than I thought.
Neither is a big mistake I think, but without reads we might want to take the cautious road and call. I just can't really see JT playing like this like ever. And without that in his range, it's a call? It feels so nitty though.
What has he been like in the 3 hands or so he played before post flop? Did he bet at all? Anything to go on would be useful...