Some demons may be more superiorly stronger than some angels but not all. The fallen angels also called demons did not lose their nature or their connatural gifts at the moment of the turn away from God. Thus a demon from the order of Cherubims will be superior in strength than AngelAngels from the order Dominions.
Since demons have not lost their con naturalconnatural powers when theythey fell, one can not say with certitude which demon is stonger than which Angel. The differences between the angels is far greater than the differences between men and the various races of mankind. Each Angel being uniquely created by the Almighty, makes each Angel unique and endowed with it’s own individual powers. We have no way to determine which Angel is stronger than which demon and vice versa, except between the various choirs of angels.
The thing that tips the balance in favour of the Good Angels is not only the fact that they were superior in number, but also that they cooperated with God’s grace. St. Paul’s words I neverin Romans 5:20 are very telling here: