Nikita Mazepin is trying to force his acclimatisation to life at Formula 1 speeds "with a crowbar".
"There were a few moments in which Mick made mistakes," Marko told Sport Bild.
"If you look at his career, it always took him two years to reach top performance. But in Formula 1 the learning period so far seems to have been significantly faster for him."
The Austrian said that is in stark "contrast to Mazepin".
"Mick approached it sensibly, while Mazepin is trying to do it with a crowbar," said Marko.