Is black sea and dead sea the same?

It’s slightly less salty than the Dead Sea, but don’t take that as a green flag - it still tastes like the last crisp in a bag of Salt’n’Shake. Roll around in the mud baths to get the benefits of 20 minerals that have been absorbed from the Black Sea.

Before I thought it is the same. Though red sea is saltier?

Red sea is saltier.