What is the difference between Zeon and Royal Zoysia grass? (Blade width, shade resistance, price, etc.)?

I'm looking to plant sod in Memphis, TN. I've researched different grass types, and found that I liked Zeon Zoysia (it's supposed to be shade resistant, compatible with this climate, etc.). Palisades and Meyers Zoysia were too wide-bladed for my liking; I preferred the softness of Zeon. I've been told, however, that Zeon is difficult to find, and I should buy Royal instead. Is Royal similar? How does the blade width compare? (As a bonus, does anybody know where to get either type for the best price in the Memphis area or somewhere reasonably close?)