Compare physical fitness to general fitness?

Your question is defined by a very thin line. The two are almost synonymous actually. General fitness refers to fitness of the body as a whole. This can be accomplished in so many ways that a book can and has been written on it. Physical fitness, I'm sorry to say is virtually the same thing. Some may argue that there are specific ways to become physically fit, like Weightlifting, cycling etc. At the risk of furthering any confusing, I suggest you refine your question to something that inquires about the differences between training for something specific, and training for general health.