Different models have different quirks. I use 4o at work and it has an annoying habit of taking things absurdly literally and using emojis and formatting too liberally instead of giving me a useful answer. Claude is much more subdued and helpful because it's conversational when you ask something open-ended, succinct when you ask it something data-driven, and almost always asks a follow-up question.

The sci-fi trope of being able to tell "AIs" apart from one another is absolutely coming true in real-time.