“Cheki” is essentially Fujifilm’s branding/name for these instant cameras in some markets, rather than a separate camera line. Based on the community answer, models such as the Instax Mini 7s and Instax Mini 25 are also referred to as Cheki, so an Instax Mini 25 and a Cheki are not fundamentally different if they refer to the same model.

If you’re seeing color or naming differences, that’s often due to regional branding, bundles, or market-specific versions rather than major functional differences. The key thing to compare is the actual model number (for example, Instax Mini 25) and film type compatibility.