Ahhh... I see Greig's production now after looking up his EP page. You're correct, Greig's better offensively. I was focused on Greig's defensive play at the WJC as a 3C since that's how Wheeler started his writeup on Greig. Again, going by Wheeler's description of Greig, Wheeler doesn't put a great deal of stock in his offense, but has a lot of praise for being a "heart & soul" type player.
"After an excellent final season in the WHL and a strong performance as a go-to defensive player at the world juniors (which were shortened by a shoulder injury that delayed the start of his season), Greig has stepped right into the AHL and NHL and continued to progress nicely towards his projection as an up-and-down the lineup NHL forward who can add skill to a bottom six or get after it with skilled players."