JJ,
I have only had the gingers for a couple years, so I'm still learning about them too. It's hard to find any info about them much on the web, so I'm just having to go by what I see in the hatches. On the buff columbians though, those F1's could almost be called gingers, actually with proper breeding you could make them gingers pretty quick from what I've been told.
But I have noticed their hackles are always more golden in mine than than the true gingers. But with every back breeding of siblings they get paler and paler like a correct buff columbian. My pullets from last year, the F2's are about perfect now, just a little stippling in the back still, but it's leaving fast. At first they look like a washed out bb red hen without the salmon breast. With them coming from milles and bb reds, they have a pretty heavy duckwing influence to start off with anyway, and I have used them to make more bb red and milles too. You will get milles on the first back cross anyway, which I have liked a lot, gives me a new line of them right off the get go.
So anyway, for now, I'm still learning about both those two myself. I did buy the gingers, not sure how the man made them, he wont say...haha. The hens on them still need a bit of cleaning up too, got a little back stippling, but great over all color. Thinking the chicks from this year will be 100% properly colored on them. Just about eliminated the back issue last year
will let you know more as I find it