"It's been a different move from French rugby to the UK, which I prefer a lot a more. It's as close as you can get to Super Rugby level. It's not as fast, but quite physical. The guys love being in the gym all day," Tuitavake says.
His brother, former All Blacks threequarter Anthony, is now 34, but will have one more season at Parisian club Racing-Metro, the home of Dan Carter, and indeed Ben Tameifuna, who will likely make his test debut for Tonga on Friday.
The younger Tuitavake arrived into camp in Auckland on Sunday, still a touch fatigued after a long season. But he says he will be up for Friday night.
"There's plenty of rugby being played in the UK. You just have to manage the load and get it right for the game. The fitness trainers want to see good times."
Inadequate conditioning levels coming into the June 2016 Pacific Nations Cup was an area identified for improvement by Ikale Tahi coach Toutai Kefu. They will have more time to work on that next week as they have a full fortnight before they face Manu Samoa in Nuku'alofa in a critical PNC match which doubles as a Rugby World Cup qualifier.
Tuitavake likes the vibe within this group and it looks very strong on paper as they eye up a second-string Wales.
"They've given the newbies the licence to express themselves. Just because they are new to the team, they don't just have to be reserved and listen to the seniors. We've got a lot of young boys coming through from the UK, ready and fresh to do the country proud."
He himself is a senior, despite his lack of test caps. He speaks Tongan and will add his piece if he feels it is required.
He sees a royal chance for a rare victory over a tier one nation.
"We look at it as an awesome chance with them losing a lot of players to the Lions. We haven't played them in a very long time. They know nothing about us and we know nothing about them."
It is a chance to reprise Tonga's last outing on Eden Park, where they pushed the All Blacks to 41-10 to open Rugby World Cup in competitive style.
Tuitavake only decided to throw his lot in with Tonga in late 2015. He had played 12 sevens tournaments for New Zealand from 2008-10, so opted for the route taken by Tim Nanai-Williams, who switched countries to Samoa via the sevens circuit to qualify for 15s.
"I was stuck in the New Zealand system, and then the Olympic window came around, so that was my only chance to switch countries. I played the Olympic qualifying and was then able to play for Tonga in last year's PNC. That was another reason the UK opened up for me."
Wales need to ensure no gaps open up on the flanks on Friday night, or Tuitavake will make them pay on his homecoming.