Barred rock Plymouth Rock gender question

[Jayteetee]

Gee it’s so hard! It’s developing so slow. Compared to the other it looks way more cockerel. We currently have 9 chickens in suburbia when our coop is only built for about 5 hens (very squishy at night) don’t know who to get rid of because our other mystery breed chicken is also a slow developer

For everyone following along, blue was a cockerel. He had real pointy saddle feathers that were growing & pink did not. Thanks for all of your input