Frater, who has been equipment manager in Mississauga since 2009, said Bastian moved up five flex points to match McLeod's curve after the latter began a scoring surge during the 2015-16 season.
Bastian and McLeod, each 19, weren't using identical sticks during Devils development camp last week, but the "Super Buddies" nickname still suits them because they could one day be linemates for New Jersey.
McLeod, the 12th pick in the 2016 NHL Draft, might be closer to earning a roster spot at this stage.
"He's the real deal," Bastian said of McLeod. "You could tell after his participation for Canada at the [2017 IIHF] World Junior Championship that he took another step. No one could really stop him in the second half and he was lights-out in OHL playoffs."
McLeod had 73 points (27 goals, 46 assists) in 57 regular-season games, and led Mississauga with 27 points (11 goals, 16 assists) in 20 playoff games in his third OHL season. He also had three points (two goals, one assist) in seven games to help Canada win the silver medal at the 2017 WJC.
"I think I feel like I'm [NHL] ready," McLeod said. "I've put on weight, have gotten faster and my shot has gotten a lot better. I feel like I've figured out the OHL. I'm hoping I could get to the NHL as soon as I can."
He appeared much stronger and faster during his second stint at Devils development camp earlier this month. He's listed at 6-foot-2, 188 pounds but said he's put on 10 pounds, the result of six weeks of weight training during the offseason.