What is the difference between the Instax Mini 25 and the Cheki series?

I’m seriously getting confused.

I’m Googling around for an Instax Mini 25 unit, but I keep getting conflicting results.

• some of the results hint on a distinct difference between the Mini 25 and a Cheki (e.g. Mini 25s come in only white, while Chekis come in a variety of colors)

• some of them show no distinction between the two, as if the two are interchangeable

So here I am. Can anybody tell me exactly what’s up with this?