Samsung always had a close relationship with Qualcomm, one of the most important suppliers of mobile processors, they usually released products with their own Exynos processors in Asian markets and one of Qualcomm's Snapdragon processors in the variant they would sell in the rest of the markets. That strategy seemed to have changed this year as they released their flagship, the Galaxy S6, with their own Exynos 7420 processor everywhere, which proved to be a very powerful one as it is made with a 14nm processor. One reason might be that the best processor from Qualcomm at the time, the Snapdragon 810 had some issues handling its temperature, but other theories stated that the reason was to acquire more independence from Qualcomm.
Recently, Samsung introduces two devices that belong to its Galaxy J series, at first thought as low-end devices because of the specs of the first member of that family, the Galaxy J1 and while the specs of the newer Galaxy J5 and Galaxy J7 are nowhere near to those of a high-end device, they are certainly not that bad and these two devices even include a front-facing flash. They both include mid-range offerings of Snapdragon processors, the one found on the Galaxy J7 is the octa-core Snapdragon 615.
It was now found that the version of the Galaxy J7 they sell in India doesn't use this processor and it uses Samsung's own Exynos 7580 instead. This is also an octa-core chipset with 64-bit architecture and although the configuration of the cores is unknown it is said to be clocked at 1.5 GHz and Mali-T720 MP2 GPU. This processor is said to be included in the still unannounced Galaxy S5 Neo and reportedly beats its Snapdragon counterpart in some benchmark tests, although the one used in that test was clocked at a slightly higher speed. Samsung seems to be committed to its processor lineup, so we could see offerings that belong to each segment, from the lower-end to the high-end, but the future is still uncertain as companies like Qualcomm will release more powerful processors to get better performance and better battery life from mobile devices.