The 22-year-old has now returned to the Championship outfit after representing New Zealand at London 2012.
The Kiwis faced Brazil's star-studded side in their final game, losing 3-0.
"I see their squad was valued at about £400 million. I'll always remember coming up against those big names," he told BBC Radio Suffolk.
"It was just a great experience all round," added Smith, who was born in the UK but grew up in New Zealand.