Fireball has the maple-shaped leaves that are a dark mix of purple and green. I planted one Fireball last year and another this year. Both of them began blooming on August 3, 2015. My Fireballs are shrubs standing about 40″ tall and each bloom is about 10″ in diameter.
Kopper King has maple-shaped leaves that are dark purple
I have my 2 Fireball and Kopper King planted next to Hinoki Crippsii
On August 3, Fireball began blooming Kopper King is almost blooming. You can see the dramatic effect created when the dark-leaved hibiscus are teamed with the Crippsii
For several years, I have had several Luna Whites. They do not have the dramatic, dark maple leaf leaves, and their blooms are not as large as Fireball.