Being a Spurs fan and having had to time to watch and assess various types of managers at the club, as well as analysing situations elsewhere, I think there's a fair assumption to say that different managers are just suited to different levels of management.
Managers like Conte, Jose, Pep, Ancelotti etc are the types you bring in if your club is expected to win major honours either because they have a country's wealth or are already the best team in the land. They can handle the expectations and they know the one or two big money signings required to almost ensure success.
Then you have managers like Poch, Klopp, Nagelsmann, Galtier, Emery etc who are the types to manage clubs who are hopeful but not expectant of any silverware whilst trying to achieve continental qualification and are therefore capable of improving multiple players to up their games (often younger ones with potential) to help the team go from pretenders to contenders, Klopp especially is a master of this, as he's achieved some of the very best silverware at both Pool and Dortmund. Arteta may fall into this too bracket too.
Then you have managers that can help teams expected to do relatively little punch well above their weight and begin to dream of continental qualification; Potter, De Zerbi, Frank, Gasperini etc do just that by improving the style of play despite working with restricted budgets and often rely on great scouting to benefit from both stylistically and eventually financially to reinvest back into the club to maintain steady improvement.
There are many more managers that fit into these categories and I'd say the large majority of them are unable to do what those in other brackets are capable of but it's why I don't think anyone in the top category is necessary better than those in the middle or bottom ones, they're just simply better at others things, they all are. We're seeing Potter struggle with the expectations at Chelsea, Poch never set the world alight with PSG, Conte and Jose both struggled with us and Nagelsmann has had his critics at Bayern.
Whether it be before the season ends or once it has ended, Conte should leave and the club needs to start being more methodical with their choice of managerial appointments. A Poch return may or may not be the best thing depending on what side of the fence you sit but he probably makes more sense than many other candidates, one thing's for sure though, we need to steer clear from managers with primarily a defence-first outlook because unless you have the best defenders available (which we absolutely do not!
) the style of football won't work long term and we also need to steer clear from managers who are reluctant and even incapable of improving players, especially younger ones, because a club like us generally need to unearth or develop some gems in order to compete with bigger clubs.
