"It's helped me understand the game more and helped me understand how I can be a lot more effective around the park - things like that."
Samu credits the development of his best attributes - his set piece and defensive work - to the experience he gained in New Zealand.
"Definitely being at Randwick - my lineout, scrum and defence wasn't really one of my main focuses.
"I just got better at it over there and I definitely think being over there has really helped my game.
"It's probably the biggest reason that I've been able to come back home."
Having signed with the Brumbies for the 2019 Super Rugby season, Samu says he will miss his time at the Crusaders but is looking forward to the next chapter of his career.
"It's going to be quite tough to leave the Crusaders with what they've done for me and the way they've been going but I'm pretty excited for that fresh challenge
"When I made the decision to go over there, I never thought I'd be back and be back here as part of the Wallabies squad. Things have turned out different and I'm here now and I'm excited.
"If I'm picked to start or I'm on the bench, I just have to back myself and be ready to go.
I'll just try and get through this week and whatever happens, I'll be doing it at 100 per cent."