Is there any difference between the tenths of different generative AIs ?

Hey all, with all the big tech companies pushing out their own version of a GenAI chatbot i'm curious
ChatGPT, Copilot, Gemini so on and so forth
Is there any real difference between them that the average user would notice ?
The only thing I noticed is that ChatGPT tries to talk in a friendly, more human way while copilot don't but except that ?

Is there any real difference between them all