Well I guess it's like the Standard Poodle and the toy poodle.
I would want a bigger Silkie just so I could keep it in with my bigger chickens. I have a standard size rooster and I'm afraid he had a lot to do in the death of one of my bantam hens (a D'Uccle).
So now I'm so scared to get any more bantams. My Sebright gets along with him okay though.
There are folks who don't care for large fowl and others who do not care for bantams; to each his own. It is no different than folks who prefer one breed over another. Personally, if I could get a HUGE fluffy silkie, I would love it! (Can you imagine a 12 or 14 lb silkie!)
Hmmm, STD cochin x my non bearded too big for my taste white roo. keeping the comb dark is the big problem, which is dominant walnut or strait comb ? at the last swap there was a silkie I swear was crossed with a sumatra.