Hi karoline! I usually only speak up on the authentication threads when I see a style that I have actually handled in person. Unfortunately, that's not the case with your bags. I can tell you that everything about the first bag (The deep red bag) looks absolutely fine to me. The tags, the hardware and the interior all have the hallmarks of an authentic MK bag.
I only saw the one dark picture of the second (gray) bag and that's not enough for me to make a judgement on. I saw in the comments that someone asked for more pics. Was that you? Did you get them?

If so, share!