Rooster or Hen?

I have suspicions of my 11 week “pullet” being a roo. It has shown a few different signs that it could be a rooster… It’s developed a lot faster than our other plymouth rock pullet and has always been noticeably bigger than her. For reference, the first 2 slides are the one I suspect being a rooster and the last slide is our other plymouth rock who is the same age. The first one’s presence even seems more rooster like and the other one gives obvious hen vibes. The first one stands taller and has thicker legs too and has started making a deeper noise than the rest of our flock. I’m leaning toward her being a rooster but what do you guys think?