I'd still say pullet. Unless you see a lot of wattles coming in in next week or so, but as someone else said legs aren't always a sigh(in my experience) good luck!
Unless they pop wattles, I'm gonna say a pullet. Pullets can be bossy little buggers, unless with the presence of the other cockerels it's hiding it's true form?
*I looked at the pics again and still think pullet, fingers crossed lol
What color skin does it have if it's bigger, could it be a...
I've got hens that have huge legs- black Australorps, I never really used that as an indicator, but at times it does hold true,
I'd say by six weeks you should be able to tell more. I have a couple photos/posts of my BAs at that age. It was easier to tell when I had a group of the same breed...