The differences are as follows:
1. The first aid box is better sealed than the first aid kit.
2. The first aid box has more space than the first aid kit.
3. The first aid kit contains more medicines than the first aid kit, and you can add daily medicines by yourself.
A first-aid kit (yàoxiāng) refers to a box containing first-aid or commonly used drugs and sterilized gauze and bandages for doctors to use when making visits.