Definitely keep them another month. When you start seeing those curving tail feathers and those pointy neck feathers you'll know for sure! I'd call Adriana a roo just from her coloring; neck colors that differ dramatically from the body color are another rooster-red-flag!
Well, I'd be cautious to use the neck feathers to sex an EE. It's pretty common for the EE hens have pointy neck feathers of another color. I'd definitely give it another month.