Civ'ed
I ain't gotta explain a thing
I said the Jaguar was useful because it could be used for the entire game and all the promotions remained useful the whole time. The Chokonu is a great unit, but it's not available until halfway through the game and its unique promotion isn't very useful for the melee units it upgrades into. If crossbowmen upgraded into siege units, the Chokonu would be much better.
Anyone who plays China and builds many Chokonus is guaranteed to have the best riflemen.