What are the differences between "conda env export -> environment.yml" and "conda list -> spec.txt"? And which is better?

Question

conda env export -> environment.yml

conda list -> spec-file.txt (All produce raw text. File names seems to be convention)

The document is a little bit confusing. It seems that the only differences are:

• environment.yml has name and channel fields;

• Their respective "restoration" command: conda env create -f environment.yml... vs conda create -f spec.txt....