At this point in Ibra's career (the year he turned 18), he was having his first senior season and scored once in 6 games, in Allsvenskan.

Roony is currently at 7 in 14 in Superligaen.

The year Zlatan turned 19, he bagged 12 in 26.

Current status is very (very) far from a sure indicator of future success, but teenage Roony is already clearly better than teenage Zlatan.