Cologne is a big tournament with the biggest teams attending. Same prestige. They didn't win 3 majors, per se, but Cologne, in general, carries that prestige and name value. Definitions of prestige down below, mens
1.widespread respect and admiration felt for someone or something on the basis of a perception of their achievements or quality.
2. respect and admiration given to someone or something, usually because of a reputation for high quality, success, or social influence