Quote:
Rounsey: With its huge population of adventurers, Jeuno boasts more frequent use of chocobos than any other nation. The main type of chocobo to be found in the duchy is the mid-sized rounsey. The pride of the famous trainer Brutus and his family, the rounsey is the result of a lengthy breeding program involving wild chocobos. This program has produced a robust mount of somewhat unpredictable temperament that is suited for long, punishing treks.
It looks like, from the description, that the Rounsey breed may very well be the top Endurance chocobo. It also mentions that all of the other breeds can also come in yellow though -- so there may be a hidden "Purebred" Yellow among all the regular yellows, perhaps!
Quote:
They underwent training that allowed them to bear the weight of heavy armor and withstand the shock of cavalry charges. Destriers were characterized by their large, jet-black bodies and thick, powerful legs. With the decline of lance combat and improvements to ranged weaponry, destriers lost their place in battle to the faster coursers.
This is also rather interesting, as Coursers are associated with Red chocobos. The quote seems to suggest a connection with high Endurance. On the other hand, it could also be possible that it is meant to suggest Black Chocobos may have some advantage to recovering from being hit with offensive items (as opposed to outright evading them -- the "unaffected by" message).
Quote:
Due to a request from the southern Mithra wishing to blend into the jungle, there are some jennets that can be found in a shade of green.
...and speaking of evasion, that seems to support Green chocobos being associated with Windsday/AGI, which for chocobos could be Receptivity.