I love my everdrive. It’s caused me to sell most of my game collection. One thing you’d notice playing on real hardware compared to a software emulation box (rPi) is input lag. This is extremely noticeable in platformers. Real hardware just performs much better.
Everdrives can add up in price. My new special toy is a MiSTer. It’s $150 for the de10 board, and all the emulators (cores) for it are open source and free. It is an FPGA based solution (like the Analogue products) and instead of emulating with software like the rPi does (or any PC emulator), the cores emulate with hardware. It uses the FPGA and programs it to act like the real hardware. The results are great. There’s a lot of different cores (the usual consoles, and even better, arcade cores!). Check it out. Playing the arcade version of games like SF2 are great. And more cores are still in development.
one thing about everdrives, is they don’t have the special chips for some games (like super fx for star fox). So there are some games that are incompatible with it.