Manchester city has built a defensive line that has the combination of speed and power, which is the greatest need of physical football, born against the dominance that Guardiola has created in the recent past, by constantly spending the biggest budget on the defense zone since the day he came, and finally getting the consistency he wanted. And with the departure of quarterback Cancello in January, this profile got even sharper: an army of elephants with the physique of the defender + the energy of the fullback at the same time. In short, the city has turned into a stronger poison that also kills the current antidote, the system is now working almost perfectly. I don't think it can be even compared to Arsenal in some aspects, or any other team in that matter.
Pep Guardiola has indeed built a squad that is not only good on the front lines but also good on the back lines. And even the Man City midfield player is also a player who is really flexible and can help the front and back lines effectively. The point is Pep Guardiola has succeeded in making Man City have a quality game that is without gaps and balanced on all fronts.
And comparing it to Arsenal in the season that just ended I think there really is a sizeable difference in strength between Arsenal and Man City. We can even see the evidence with several Arsenal vs Man City meetings, which Man City always wins quite easily. Arteta still has a lot to improve Arsenal in the coming season. But if Arsenal is compared to other teams besides Man City, Arsenal are also clearly superior and more consistent than any other team in the Premier League except Man City.