Beelink or Steam Deck for work/gaming on RV?

Hey all, I want to upgrade the setup that I use on my RV. I use a Raspberry Pi 3 for basically watching videos and some retro gaming. I want to be able to play more resource-intensive games, although definitely do not require anything AAA in the highest settings - I’m talking about Starcraft 2, Shieldwall, TABS, Humankind…...