Is there any difference between pacifiers? I am considering to buy this Nuk pacifier for my newborn.

Start or don't start it's up to other moms who prefer to use pacifiers. Pacifiers in general is okay if you know when to stop it. Like for my son and daughter when they were 4 respectively, i told them if they lose this last pacifier, they won't get another one. And they both understood and after it got lost, they didn't ask for it anymore. If u're worried about how it affects the teeth, so far his teeth as well as his sister is fine.