Two guys who are really not at the same place in his developpement ..
Mysak play a lot last year and didn't really showing sign of progression since he come to North America, this guy is not a bad player but seem to already reach is potential in some way. I don't really think Mysak is better now than he was at the same date one year ago. Personnaly, I will trade this guy the sooner I can before he lose all his value see hype of a young prospect. I thought the same at the time for Nathan Beaulieu who are not better at 20 than 18.
For Rohrer, it's completly the opposite, this guy are very young, skate like the wind and can have a very nice developpement in his game in the next year because of his age, the role he will have on his team and he still adjusting to the North American style of game; Mysak play in NA from 2019-20! Rohrer will be a very interesting prospect to watch in the next year!
The only way to have a debat for me between the 2 players it will be in 1 year if Rohrer show no sign of progression at all but for now I don't really understand why some think Mysak still a better prospect than Rohrer. Personally, Mysak become more a suspect than a prospect with is progression in the lasts years and Rohrer still have the time to elevate is game to another level!