I could be wrong, but I'm almost positive you can show those roosters. Just because they don't fit the bill in regard to accepted standards of perfection doesn't mean you can't show them. I believe there is usually an "AOV: All Other Varieties" inclusion in most poultry shows, and they would be showable in that category if you wanted to show them. Here is more information about the AOV category
I think they are beautifully colored, but both of them look more like porcelain Silkies than partridge to me....the secondary one in the picture being more porcelain colored as it's muted, than the other, the main one in the photo appears more of what they call pyle for Silkies (different than pyle for the OEGB)
Either way they're pretty but don't look partridge to me at all.