Putting it laymen's terms, here in the US, a Cinnamon Queen is a cross between a Rhode Island Red rooster and a Rhode Island White hen. That is the standard. Period. End of story. While the APA does not recognize the breed per se, all reputable hatcheries know this is the industry standard. Using a Rhode Island Red hen and a Rhode Island White rooster results in what is known as an ISA Brown. Here in the US, there are no trademarks on breed names. Standards, yes. Trademarks, no. That means that hatcheries do not hold rights or patents on breed names.
In the last few days after thinking about it, I've decided to get pure stock from the hatchery in my area and raise my own Cinnamon Queens and ISA Browns rather than buying chicks of those breeds. And since no one here has raised second generation of either breed, and therefore cannot answer my question, I may experiment with the breeds (keeping the purity of each breed) and seeing what happens. It will take a couple years, but Lord willing, I have time to experiment and see what happens.