Both the RG35XX and the Miyoo mini are amazing devices for the price range, I greatly recomend watiching retro games corp video on them, basically they can run up to PS1 flawless and supports saves and save states, it’s the kinda of handheld you keep on yourself all the time to play when you’re bored or on a queue, not very comfortable for long play sessions. The RG os built like a tank and has real time clock for Pokémon games with a worse d pad, Miyoo don’t has the clock but has wifi for net play, OTA updates, better screen and dpad but tends to have some build quality issues.