They both believe Jesus is the Archangel Michael, they just have different views on Michael. They are both wrong. Here’s what I know:
THE BIBLE SAYS:
“For to which of the angels did He ever say, ‘Thou art My Son, today I have begotten thee?’” Hebrews 1:5.
“But of the Son He says, ‘Thy throne, O God, is forever and ever...’” Hebrews 1:8a.
“But to which of the angels has He ever said, ‘Sit at My right hand, until I make Thine enemies a footstool for Thy feet?’ Are they [the angels] not all ministering spirits, sent out to render service for the sake of those who will inherit salvation?” Hebrews 1:13-14
From the foregoing it will be seen that our concept of Michael, as just another title for the Lord Jesus Christ, is vastly different from the views of others who teach that Michael is merely a created, angelic being and not the Eternal Word of God. In direct contrast to such a depreciating Christology, Seventh-day Adventists hold that Jesus is “very God of very God, of the same substance as the Father” - coequal, coexistent, and coeternal with God the Father. We believe that there never was a time when Christ was not. He is God forevermore, His life being “original, unborrowed, underived.”
That doesn’t sound anything like JW.