Sorry for the late reply again
It's still too young to determine but the bigger one is usually male.
Crosses that produce brown and white goslings are usually female but it's not the case all the time.
Yeah as you can see they aren't pilgrims and are just mixed breeds
The two goslings in the photo with the adults will also be brown and white.
Your two goslings one will be all brown and the other will be brown and white :)