Hot Lunch
Master Black Belt
IMO, if belt rank doesn't tell the whole story, then years of experience doesn't tell much either.
In karate, some schools require students to be of a certain rank before they can free spar, while others allow students to free spar right away. Some schools have more than 9 kyu ranks, where the focus of the ranks before 9th kyu is on kihon katas (Taikyoku, Fukyu, etc), where the schools with 9 kyu ranks have you start on Pinan/Naihanchi or Geki Sai katas right away.
Years of experience in these various schools aren't going to be the same.
In karate, some schools require students to be of a certain rank before they can free spar, while others allow students to free spar right away. Some schools have more than 9 kyu ranks, where the focus of the ranks before 9th kyu is on kihon katas (Taikyoku, Fukyu, etc), where the schools with 9 kyu ranks have you start on Pinan/Naihanchi or Geki Sai katas right away.
Years of experience in these various schools aren't going to be the same.