Isolated I like the one with white better, but then thinking about it further I'm not sure. The white part might take a bit too much attention away from the rest of the chip/denom. I think I would end up going for full gold, but both options are good.
How about option 3?
View attachment 30142
On an unrelated point, the text on the green is tilting me a bit. It's properly "twenty-five" with a hyphen. As for the logo color, white>black>>>>gold.
I like the 3rd option but can't stop thinking of this.
black w/white