Emulation vs real hardware is always a raging debate, but I wouldn’t overthink it in this case. Some minor aspects are better throughout the original console releases, but it’s far more convenient for most people to play the old titles through the Nintendo Switch Online libraries. If you don’t have a Switch, buying the games on older consoles is also a great, authentic option — just make sure you do your research. Getting old systems to work with a modern TV can required a bit of work.