congrats on the new arrivals, how are they doing.
Silkies are so funny very cheeky great fun for children more fluff than feathers. I would say silkies more like small hens bamtums are smaller I just have a few hatched from eggs. They dont cope well with rain so need to be able to keep dry ( more fluff than feather) not great eggs layers but they do pack a small egg full of goodness.
good luck with them