"Is this the same FAA which "approve" the Boeing MAX before the two fatal crashes? (I'm just askin'.)"
I think the problem was that the FAA naively let Boeing self approve the MAX and more.
And indeed it's the higher max power levels used in the USA that makes this difference too.
Juan Browne at Blancolirio is mostly very reliable in stuff like this.
https://www.youtube.com/watch?v=aHIFs4EkA0k
Also note the fact that it matters what came first.