An argument could be made that Toronto's development path could be better long term for their player. Neither are going to have a gigantic impact this season.
I like Virtanen's game, but I still think a year to work on things in the dub would do wonders. Especially as the guy. Reinhart for example looks a lot better this season than he did last--just because it's a lesser league against kids, doesn't mean he can't improve.
It really depends on the player. The same was said about Bo Horvat when he struggled offensively at the beginning of last season. I don't think many would now argue that he would have been better served by a year in junior.
Just as a general observation I think the more physically mature guys like Virtanen and Horvat probably make the transition easier. Not to say that this will be the case with Jake but I think that he could quite possibly be a guy who develops better in the NHL.
We'll have a better idea after the 9 game mark, I suspect.