Power usage is dramatically lower than the equivalent Intel chip, to the degree the latter exists. In addition to the CPU just being much faster overall, these also come with a Vega iGPU with half a gigabyte of dedicated memory.
It won't play Half-Life 4, but I've always noticed Intel chips being laggy and hot if hooked up to a screen with any sort of resolution, or if trying to run e.g. Factorio. Neither of those are a problem here.