These look like backyard crosses rather than standard hatchery EEs, with the typical pea comb. This makes them harder to sex. The darker one has a rose type comb, so maybe part Wyandotte, which are notoriously hard to sex at a young age. Its comb does look fairly large and somewhat raised, so maybe male, but too young to be sure. The lighter chick looks like it has a single comb, it's fairly prominent, but not yet pink, so you will have to wait on this one as well.
I hope you can post again in a week or two. Would be interesting to see how they come out.