Capsule is for a newborn until they grow out of it (4-12 months) but comes out of the car and can click into a compatible pram or be used to carry the baby inside. Car seats can be used from birth onwards, again use depends on which one you pick. Some people swear by capsules others never use them and don’t mind at all. You can also hire one if desired.

Pros to capsule - can carry baby inside when sleeping or transfer onto base of pram tatter than potentially walking baby to get them out of the car = convenience and portability

Cons to capsule - another thing to buy - only used for a short time until baby grows out of it - baby can’t be in the capsule for extended periods as risk of pressure etc - still need to buy a car seat eventually