User blog comment:B214/Shin DxD 1 discussion/@comment-5.36.155.187-20180803173910/@comment-10330822-20180819023307

But what is the baseline for "other angels" to "other devils"? The Four Great Satans were considered the baseline for "other devils" that the quote is referring to. When you are so far above everything else, then that's when you become something else. The Four Great Satans were considered the height of devil power, so when something comes forward that surpasses that, its suspected to be something else.

In other words, its just a matter of perspective.

For all we know, Michael is just has a power-level comparison of a high-tier Satan, but in respect, everything beneath him in Heaven is only a low-tier Satan or Ultimate-Class. So Michael could still be far stronger than any other angel, but still a regular angel in comparison to a regular devil expectations, such as with the Satan-Class.

That's the problem. They haven't established the limitations of what an angel should be capable of, where in they have been for a devil.

Just because Michael has a special title "Archangel" doesn't mean there is any real difference between him and other Seraphim "power-wise". After all, Michael has been alive since the dawn, he's one of the first angels. If he was really a "Super Angel" than he should have been able to kill the other devils and fallen angel off long before Sirzechs and Ajuka's births.