it's all up on the fact if the treasure is still as it used do be in 2.0 and 1.0 or if changed as the other treasure changed.

If is the latter then at 400 you unlock both of them and every 60 draws after the 400th draw you can get them as common rares, otherwise, if is still as it used to be then at 400 you get one and at 800 you get the other one.