One is also playing in the top 6 on one of the most offensively potent teams in the league while the other is playing limited minutes in the bottom six on the Canucks. Cap is such a commodity right now I think you're basically looking at apples and oranges. Fair value you probably have to add a bit if you identified you wanted Nylander (from a Canucks perspective) but that cap hit throws anything close to fair value out the window.
I don't know that there are any good trade partners for the Leafs in this case simply because of the cap issue. It will be interesting to see if a trade happens!