Originally Posted by
Hybrid
I don't think she meant it that way. Her powers being the same refers to the effect, not the means. I believe it's an important distinction that Cassie has innate powers but Scott doesn't. Not sure how it works, but I guess Scott never tried exposing himself directly to them and only regulated them through his suit, because that sounds rather dangerous. If it isn't, why aren't more people doing it?
But you do have a point, it is weird that Hank, Janet and Cassie are able to shrink and grow naturally, as well as various other characters, but not Scott. To be fair, I think Eric had to use a suit as well. So there's a theory: maybe it's selective. Idk, but as it stands I haven't seen anything to suggest he doesn't need a suit.