An attempt to Sex My Swedish Flower Hen Chicks

I have read about several methods on sexing chicks without using the vent method, feather sexing and combs are two methods.  I'm going to try to use these methods on the two chicks I hatched this week.

Let's first look at combs. I've read that on a young cockerel the comb will extend right down between the nostrils, with a pullet it'll end somewhere above the nostrils.

Now we'll move on to the feathers: There are two feather sexing tips I have read. I found this diagram on pinterest:

The above diagram is pretty self explanatory. I've also read that if you look at the wing tips with the winds closed the little roos will have fuzzy furry wing tips, and the pullets will have more feathery wingtips.

So here are my two chicks hatched 3 days ago on June 29. The pictures on the left are the yellow chick, the pictures on the right the yellow/black chick. So what do you think?

Here is what I'm going with-they both have similar combs and wing feathering, though the black and yellow chicks feathers seem much more random than the yellow chicks. My verdict both pullets-somehow I'm guessing I'm going to be wrong lol.  I'll post updates in a few weeks when I know for sure!