As someone who grew up in an apartment building with concrete floors, I assure you that concrete is useless for internal noise dampening.
In the concrete building, we could never hear neighbors above of below us, in the wood framed building, we could hear foot steps and even voices. Our upstairs neighbor had a squeaky bed and we could clearly hear the bed every time they were intimate.
Once I lived on the bottom apartment in a two storey apartment block. The floor boards were a nightmare and eventually we had to move. Upstairs footsteps across the floor were loud enough to wake us up, and I don't just mean squeaky boards, but just the thumping knocking sound resonation. Sometimes I could make out the words being said in their conversations. Never again.