Wallabies defence coach Matt Taylor said ahead of Sunday's Bledisloe Cup Test in Wellington, "I think you'll certainly see a change in how the Wallabies operate from maybe how it's gone in the past."
Taylor felt that while Rennie had a New Zealand flavour to his coaching, there was also evidence of his exposure to British rugby with Glasgow in Scotland.
Having spent time with the Reds before spending eight years in Scotland, Taylor said: "What we've tried to do as a coaching group [Rennie, director of rugby Scott Johnson, attack coach Scott Wisemantel and Taylor] is, even though Dave was overseas, we spent a lot of time sitting down and talking about the game, how we wanted to coach the Wallabies and get clarity around our certain areas and then we bounced ideas off each other.
"We challenged each other, and we try to come up with what we believe is the best method."
Taylor believed the public, on both sides of the Tasman Sea, would be able to see that difference on Sunday.
"I think you have got to have a balance in your game. You can't be all-out defence, but you can't be all-out attack and no defence. You've got to kick when you need to, run when you need to, and it's making those correct decisions on the run," he said.
At the same time, Taylor said, the All Blacks were also working with a new coaching team under former assistant coach Ian Foster.
"I think both sides are starting afresh in a certain way.
"The coaching group at the All Blacks is new, and they've got some young, exciting players coming through their ranks as well. We're probably having a little bit of a guessing game between both squads in a sense.
"The main thing we've focused on in the new coaching environment group is embedding our structures.
"We don't know how the All Blacks are going to operate, so we've just been focused on us. We'll have a little bit better of an idea when the team is selected," he said.
Both camps revealed their sides on Friday with new players featuring in both teams.
Limited tickets are available to the First Bledisloe Cup Test presented by Steinlager HERE.
The teams are:
1.Joe Moody, 2.Codie Taylor, 3.Ofa Tuungafasi, 4.Patrick Tuipulotu, 5.Samuel Whitelock, 6.Shannon Frizell, 7.Sam Cane (captain), 8.Ardie Savea, 9.Aaron Smith, 10.Richie Mo'unga, 11.George Bridge, 12.Jack Goodhue, 13.Rieko Ioane, 14.Jordie Barrett, 15.Beauden Barrett.
Substitutes: 16.Dane Coles, 17.Karl Tu'inukuafe, 18.Nepo Laulala, 19.Tupou Vaa'i, 20.Hoskins Sotutu, 21.TJ Perenara, 22.Anton Lienert-Brown, 23.Caleb Clarke.
1.James Slipper, 2.Folau Fainga'a, 3.Taniela Tupou, 4.Lukhan Salakaia-Loto, 5.Matt Philip, 6.Harry Wilson, 7.Michael Hooper (captain), 8.Pete Samu, 9.Nic White, 10.James O'Connor, 11.Marika Koroibete, 12.Matt To'omua, 13.Hunter Paisami, 14.Filipo Daugunu, 15.Tom Banks.
Substitutes: 16.Jordan Uelese, 17.Scott Sio, 18.Allan Alaalatoa, 19.Rob Simmons, 20.Rob Valetini, 21.Jake Gordon, 22.Noah Lolesio, 23.Reece Hodge.