I have both, and Perplexity is much more like a search engine than a chat companion (or at least that's how I use it). I like both, though.

You can select the model. I very much appreciate the Claude Sonnet models which are very good and rational discussion partners, responding to arguments in detail and critically, allowing for the dialectical exploration of complex topics. I have also experimented with other models including ChatGPT, Gemini or Grok, but the resulting discussions were only a fraction as useful (i.e. more optimized towards affirmative feel-good small talk, from my humble point of view).