PlayStation Classic is a faithful reproduction of the experience of playing original PlayStation games in the mid-1990s. The experience is technically accurate, but the PS Classic doesn't feel like it was created by a company with a true and abiding passion for the games of this era, or even with the good sense to fake one.
While Nintendo is setting the world on fire with its 90s nostalgia trip, let's say your 16-bit desires are more unconventional. Perhaps you enjoy your games with a bit more violence and/or hedgehogs. Then the Sega Genesis Flashback HD may have you covered.