I am by no means an expert, or anywhere near that, but time finally verified that my remaining bird in question was..is..a cockerel....and he looks a LOT like yours...I'd vote for boy (sorry). Mine is 18 weeks old now, just began crowing at the 17 week mark, but he's always been a little, shall I say, slow?
Here's a pic of him at about 8 weeks as a comparison:

Here's a pic of him at about 8 weeks as a comparison: