Cream is recessive, one copy wont affect or dilute hackle or saddle color, here is my theory about the different shades....but I'm also thinking from all my reading that a single copy of the cream can dilute the gold which is why we see a range in hackle and saddle color
Silver Looking roosters can be..
1.Just Silver S/S with or without cream.(homzygous cream ig/ig or Ig+/ig
2. Golden(S/s+) with cream(homozygous ig/ig) and double barred
3. gold s+/s+ with cream and without autosomal red and double barred(B/B)
Cream Looking roosters can be..
1. Golden(S/s+) with or without heterozygous cream(Ig+/ig) cream and double barred
2. gold (s+/s+) with cream(ig/ig) and autosomal red and double barred
3. gold (s+/s+) without cream and without autosomal red, double barred(just like the crele Dutch bantam pic I posted)
but at this point you have a good game plan, stick witht he lighter boys and always keep the good hens..