I've said it once, I'll say it again: the difference between Mike Gartner and Bernie Nichols is Gartner is the owner of what will likely be one of hockey's most enduring and respected records. 15, 20, maybe even 25 years from now, Gartner's string of 30 goal seasons will still be talked about in the highest regard. It's a record that will be one of the hardest to break, right up there with some of Gretzky's and Glenn Hall's consecutive games streak. (Which SI once listed as the hardest to break in sports). That's what got Gartner into the Hall. Longevity and consistency is one thing. Lots of players not in the Hall have that. Longevity and consistency that reach mind-boggling, historic levels are another. Gartner did what Gretzky, Howe, Hull (both of them), Kurri, Richard and all the others couldn't do. That's why he's in the Hall.
Nicholls, sadly, doesn't have that on his resume. He was a heck of a player before Gretzky arrived, an even better player with Gretzky, and a very good player after the trade, but Bernie Nichols doesn't have anything on his resume that lifts him into an HHOF class.