From tomorrow, 29 September, will be available in stores long awaited SNES Classic Mini, but if you already have a home NES Classic Mini then you may already hold holders of, in a sense, the "new" console of Nintendo. This is because, as stated by Digital Foundry which analyzed the hardware in the mini version of the SNES, this would be the same as the one used by NES Mini, which would also explain why a year ago, so much power was used to emulate 8-bit games that required much less.
In essence, between NES Classic Mini and SNES Clssic Mini would only change the aesthetics:
At hardware level, we have the same Allowinner R16 SoC, with four ARM Cortex A7s coupled with an ARM Mali 400 MP2 GPU. Hynix provides the single memory chip - a DDR3 module from 256 MB - and there is a generous NAND memory from 512 MB.
The difference comes from the software level that emulates the Super NES, probably built by the Nintendo European Research and Development team (NERD) in Paris, running on open source Linux platforms. The software not only emulates the Super NES itself, but a series of additional processors specific to selected titles, including Super FX and Super FX2 chips used for Star Fox, its sequel, and Yoshi's Islans, the CPU upgrade SA1 used by Super Mario RPG and Kirby Super Star; even Super Mario Kart used additional hardware, the NEC DSP-1, faithfully replicated by the mini console.
Why did this choice by Nintendo, if the hardware was not fully exploited with the NES Mini? We recall that, fortunately, the Japanese company has recently announced the continuation of the production of SNES Mini for the whole 2018 and the resumption of that of NES Mini from next year: this way it will be much easier to handle it, with identical hardware that will differentiate the two consoles only at the time of installation of the outer shell and the software we will play with.