Wayne Rooney scored only one World Cup goal in eleven games. He didn't score that one goal until his 10th World Cup game. Ahmed Musa has four World Cup goals. That's football for you.
Elderson Echiejile has an AFCON goal. Kanu Nwankwo went to six AFCONs and didn't score a single goal. Echiejile played as a left-back. Kanu played as an attacker. That's football for you.
Ronaldo Nazario scored 14 UCL goals in 40 games. Serhou Guirassy scored 13 UCL goals in one season for Borussia Dortmund. That's football for you.
Not comparing. They're just strange realisations.