The Frenchman was brought in last summer by Wenger, but struggled during his debut season at the club.
Lack of form and injury led to the Gunners recruiting Pierre-Emerick Aubameyang in January, further hampering the striker’s game time.
But the 27-year-old has enjoyed a positive start to this season, scoring five goals and producing three assists in 12 appearances.
Speaking to Ian Wright on Premier League Today, Lacazette said: “On the pitch, yeah, we feel differently. Working harder?] Yes because there is more tactics now.
“The coach as well is demanding higher with every player. Yeah I like it. It’s the best way to improve.
“The coach – it doesn’t matter which player it is – will always ask them to be on the top. I think he’s one of the reasons things are going well.”
Lacazette also revealed that he was left frustrated, by finding himself regularly substituted by Wenger last season.
“Yes I was [disappointed] last season I knew I had to score in one hour,” he added. “When I talked with the coach, he has to make some choices which I have to respect.
“When you’re a striker you want to play all the games and most chances come at the end because defenders are tired.
“That’s why I was frustrated but it was my first season and all my family said “don’t be like this, enjoy the club”. Now I feel I can [stay on for the full 90 minutes] .”