The former Perpignan coach will look to loosen the shackles at the Stade de France, and Gori believes the different style of play is already paying dividends.
The scrum-half, 21, said: "There's a big difference although it's still early to say because it's only been two weeks.
"Already the training is different with two sessions a day; one in the morning, then a pause for the team meeting to study our opponents, and then training in the afternoon.
"Our style of play is very different and we're trying to learn Jacques's concept and then put that into practice on the pitch.
"It will be very difficult to show everything against France but we'll try.
"Mallett was very concentrated on defence, which of course was one of our strengths last year, but without an attack you can't win so Jacques is concentrating more on attack.
"We'll see how it goes."
Gori, capped nine times, is part of a youthful backline picked by Brunel, with uncapped 21-year-old Giovanbattista Venditti will on the right wing while Tommaso Benvenuti, 21, and Alberto Sgarbi, 25, both with 12 caps, will combine in the centres.