How are orthopaedic mattresses better than ordinary mattresses?

I have tried both orthopaedic and normal mattresses and I find the orthopaedic are harder whereas the normal ones are easier to sink into and feel more comfortable. Although I think both give me the same quality of sleep. How exactly do ortopaedic mattresses benefit me over normal mattresses and do they work better for all people in general?

Hope someone can assist.


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