So I got that second common leaf in the mail today, the one I'd purchased from another collector. I was afraid these two dragons would be too similar, but they do have a few key differences. This one is a female, I'm calling her Vivace. She has YYrrBb as her skin tone, which technically means she's green, but... not really. That is definitely yellow. She also has a single starburst, and purple eyes underneath the black pigment- which you can sorta see under the starburst, when it goes over her eye there.
The other dragon, which I still don't know much about, does appear to be a more true yellow hue- I'm betting either YYrrbb or maaaybe YYRrbb. I don't know its gender, and it has more metallic colors on its wings instead of those vibrant blues and purples. With no starburst, it's hard to tell what color its eyes are.