The phrase "same coin" means two things or ideas that are closely related or connected to each other. It implies that these two things may seem different, but they share a common origin or are part of the same overall concept. Full definition
It's really just flip sides of the exact same coin. (nakedpastor.com)
@NelioSoft Creating good content and sharing in social media r 2 sides of same coin. (neliosoftware.com)
The same «backup plan» rationale has been used as one of Litecoin's value propositions, however Bitcoin Gold serves this function better than Litecoin because it has the exact same coin distribution and money supply as Bitcoin; Litecoin ownership is much more narrowly distributed, making it unsuitable for use as a universal store of value and reserve currency. (dailybitcoinnews.com)