The Belgium striker has rightfully taken huge plaudits for a memorable season which has seen him hit 19 goals.
But goalkeeper Guzan - who forced his way into the team ahead of Shay Given - has had an equally good year, according to Lambert.
"If we didn't have Brad we could have lost more games," he said.
"Strikers are gold dust but so is a goalkeeper. I class people as equal. The team have done it this season, everyone's been great."