The difference is the elastic band in the waist and also elastic cuffs inside arms. They seem to be designed to prevent air/wind going up the jacket - so that is why I thought about either paras or police (motorbike).
As it turns out both these features are NBC protection measures. As ridiculously as it sounds it was designed to prevent radioactive fallout from entering inside of the jacket. Somebody quickly found out, that in event of nuclear holocaust this piece of cloth would be quite useless so all jacket produced after 1960s don´t have it.
I am sharing it to prevent somebody buying jacket like this as an para version.