Colwill is confident Maresca's approach will bring success to the Blues.
"The gaffer plays similar to a chess game," Colwill told chelseafc.com. "Every piece needs to be in the right place to set up a move, set up a goal. It’s a lot more demanding mentally.
"I always need to be aware of where I am on the pitch and how I can help the team move up the pitch. That is the main thing.
"The level of concentration is crazy compared to other managers, I would say. I enjoy it and it can tap into my strengths. He’s been really good with me personally and everyone in the team. I’m really understanding the way he wants to play very fast.
Colwill continued: "As a coach, he is very hands-on. He gives every player the same amount of time and effort. Everyone can see it on the pitch, the difference.
"The players are much more comfortable with the system. You can tell by the patterns of play and doing what the gaffer wants, which is working. We are creating opportunities to score."