Achieving commercial success often means managing delivery as well, but saying the two roles are equivalent is a mistake. Someone who is a true product manager

Achieving commercial success often means managing delivery as well, but saying the two roles are equivalent is a mistake. Someone who is a true product manager, can usually pickup project management duties. The inverse is not true. I have seen many times someone with a project management background trying to get into product management without shifting the attitude or thinking the two are one and the same, only to drive developers nuts and fail to deliver good products.