These are pretty much identical to the native Oxygen window decoration with the no side borders setting.
The only inconsistencies they have are-
The center graient doesn't match up perfectly, which can't be fixed because of how Emerald works currently. I think I have it as close as it will get.
Also there are some annoying shadow issues, which you can see in the screenshot. This is another Emerald bug present in all themes.
Compiz needs a new decorator!
Overall, at least to me, these issues aren't really that noticeable and don't make them annoying beyond use.
This includes versions for the Oxygen, Obsidian Coast, Norway, Wonton Soup, and Oxygen Cold color schemes.