Well, despite the superficial similarities, the stories of the PAF and Wenger are quite different.
1. With Fergie, Manyu won more than in all the previous 100-plus years of existence. “Arsenal” under Vengerych, for example, took only 3 Championships once morest 13 from ManU.
2. Manyu took the Champions League several times. Vengerych said many times that he dreams of winning the Champions League, but he never mastered it.
3. Miscellaneous breakup stories: Fergie took the title of Champion of England in the last season. Vengerych barely made it to the end of the season without being fired.
4. Vengerych left badly, through counters with management and fans. SAF left in the status of a living legend.
That is, if you look at it soberly, we say SAF, we mean Manchester United to a much greater extent than Arsenal-Wenger.