That is true, but that was not his draft profile. Moniak's draft profile read "His above-average speed works on both sides of the ball, and some see a future Gold Glove caliber center fielder."
I think what the comp comes down to, is that they have similar frames. If they had the same type tools and skills now, but Armstrong had a frame that looks to fill out more then that would be great. But physically they look the same.