That might be how it started, but there are differences. For example support for LLama 3.2 Vision was added to Ollama[1], but not upstreamed[2] to llama.cpp due to image processing requirements AFIAK.

[1]: https://github.com/ollama/ollama/releases/tag/v0.4.0

[2]: https://github.com/ggerganov/llama.cpp/issues/9643