[emil3000]

I think betting is fairly clearly better. An unknown is pretty likely to check down some worse T hands (maybe not on FTP or Stars, but from what I hear Crypto is pretty nitty), and also less likely to play T9 like this and not get away.
This line does not look like a bluff at all IMO, so if he is good he should get away a lot when beat.
Against a good regular I think checking has a lot more merit, basically because betting loses value and because he is more likely to valuebet for you.

I'd reraise flop here pretty often BTW.