Yes I have chronic fatigue and Fybro. I notice that with chronic fatigue I have a sore throat all the time. And more symptoms of a very bad cold -without a cold. . Fybro is muscles ceasing up and not able to move - most of the time. Exhaustion is awful so not to sure which that one is. Also no energy. Like 5 minutes of low energy to 1 hour rest. More I do the more I am bed and not able to move. Only my opinion.

Chronic fatigue is lack of energy to do every day tasks. Fibro is a lot od medical symptoms which involve pain.

I have them both. I was dx with CFS after having pneumonia n still after a few months never feeling as it went away.
With the1st dx of CFS, I was weak, sleeping up to 20hrs a day, couldnt get out of the bed, had a lot of cognitive problems - memory, speech, numbers, my mind would literally go blank sometimes, n anxiety.
About 6mos later started feeling the fibro pain of burning achey muscles, sensitive to touch, pins n needles feeling. Was then dx as also have FM about 6mos the CFS dx.
Since then the list of symptoms has been ever growing, n went from sleeping all the time to now having insomnia.

Cfs and fms have pretty much the same symptoms and its something I questioned myself recently.

From what I found, in cfs fatigue is the predominant symptom. In fms, pain is the predominant symtom.