This is a marketing ploy. Usually, the color of the case changes, but otherwise they are the same. So it was at least with model nano s. I liked the model in the white case, but now they sell it with a good margin, because circulation was limited. Perhaps ledger nano x (To The moon Edition ) over time will also cost more than now. But I know for sure that the ledger's products at the moment are one of the best means of protection. Here are some user reviews about nano x: https://revain.org/wallets/ledger-nano-x. Those who wish can add information about to the moon edition, if there is anything to say on the topic.