Rangers striker Alfredo Morelos
Pukki joined Celtic from German club Schalke in the summer of 2013 for a transfer fee reported by Sky Sports to be worth £3 million.
The 28-year-old Finland international striker struggled to make an impact at Celtic Park and moved to Brondby in the summer of 2014.
The forward is now playing for Norwich City in the Championship in England, and has scored 11 goals and provided two assists in 17 league games for the Canaries so far this season, according to WhoScored.
Rangers signed 22-year-old Colombia international Morelos from HJK in the summer of 2017 for a transfer fee reported by Sky Sports to be worth £1.5 million.
Pukki played for HJK during the 2010-11 season and earned the move to German club Schalke.
Johansson, who played for Rangers from 1997 until 2000, has revealed that HJK CEO Riihilahti told him in 2016 that Morelos was better than Pukki.
“It was towards the end of the season in Finland, September or October 2016,” Johansson told The Scottish Sun. “I went to see HJK in my assistant role with Finland to scout some of the Finnish players. I was a guest of their chief executive Aki Riihilahti, who I know well after we played together.
“Finnish football is slow and tactical. There’s no quick tempo and if you lose the ball you get back in position. It’s hard to compare and it’s really hard to scout there because of that. But Aki said Alfredo was better than normal.
“He’d had Teemu Pukki and said he was better than him, more robust. You could see he was totally different to Finnish players. He used his body really well.”