So why do I bring together these two forms of singing, well I have seen both and and the singing is similar. It it like solemn complaining to the audience.
Here is research I found on similarities. There apparently is little as they both arrived to the areas from different sources. In terms of being popular away from the high society-there they are the same.
I like to listen to stories and if you ever wanted something to enjoy as a past time, then both Fado and Flamenco are available. For me Flamenco is my favorite but I could learn to really appreciate Fado. I have only seen it once live but I think it is time to revisit that experience.