You won't get laughed at, neither will you do very well. I can't tell if the Cochins have vulture hocks from the way they're posed. That said, if you think they do they probably do. What I can see is their type which is poor. They are not nearly "round" enough. Bantam Cochins should be big balls of feathers, round from every direction. The variety you've chosen, Red Cochins, are not a variety that's had much attention. Most come from hatcheries which I suspect is true of these birds. I rarely see them at shows & when I do they look like yours.
Your Silkies essentially are in the same boat. They lack the fullness they should have. Their crests & cushions especially need to be fuller & they appear long in the back.
I'd suggest you go to the show anyway to look at the Silkies & Cochins that place & see how they differ from yours. While there talk to the people showing those breeds. Most of us love to talk about our birds & most want to encourage new people to take up the fancy. Also, most shows have a sale area where breeders sell excess stock. You might find something worthwhile to take home with you.