I just continued using what the hospital uses during my stay. Most hospitals uses Huggies naturemade. Should there be any rash reaction, they will inform you. Otherwise, can consider just sticking to the brand they use :)
We continued using the same diaper from the hospital - Huggies naturemade for our first child. No rash at all except once (2 days). Should be using the same brand for the second one.
I tried other brands & find that Merries & Mamypoko airfit is the best so far. It's soft & don't give rashes to my LO. Moony is good too.