When you’re linking two phrases with “unlike” you need to keep them in grammatically parallel forms: “Unlike Cecile, Gareth likes persimmons.” This sentence parallels two people: Cecile and Gareth. But “unlike at home, my boss won’t let me wear sandals” is incorrect because “at home” and “my boss” aren’t grammatically parallel. You’d have to change this to “at home” and “at work” or something similar.