Mike Brown arrived in New York with a new system and a clear vision — and just three days into training camp, he says the Knicks are already ahead of schedule.

“I tell you what, the team is probably a little bit ahead on both sides of the ball than what I expected we’d be at this point,” Brown said Friday after practice at the team’s Tarrytown facility. “They’ve been working hard. They’ve been trying to pick up stuff on both ends of the floor as quickly as possible.”

Brown is bringing a West Coast identity to Madison Square Garden — the same up-tempo, ball-moving system he ran in Sacramento. The Knicks are betting on that style — one built on speed, spacing and selflessness — to unlock another level after last season’s run to the Eastern Conference Finals.

“Their attentiveness has bee

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