We've bred wyandottes for 9 years. Hatchery birds are harder to sex, but in our line-the males combs are pink quicker and they are wider than the females. The female's combs are almost a gray shade when they are juveniles.
I can't tell by those photos, but if the chick doesn't have a single comb-then it looks like a blue wyandotte. We used to raise them for several years. The last chick you posted looks like a splash color of the Blue laced Wyandotte variety. They are different varieties.
We started our waiting list for chicks. We raise, blue-laced red, silver laced and bantam partridge. We are NPIP certified and have shipped nationally for several years. Please see our website for prices and photos of our birds.
http://nittanywyandottes.weebly.com/for-sale-and-price-list.html
Hatcheries usually sell splash colored birds-not black-laced. If you are looking to breed-then look for a breeder. If you just want eggs-then hatcheries are great.