What is the difference between a narrow (natural) and a wide (wide) Difrax s-baby bottle?

The Natural S-baby bottles have a narrow neck and teat, and are easily accepted, even by new-born babies.
The teat on the Wide S-baby bottles is wider, which means your baby opens its mouth more widely when drinking. Many mothers who combine breast and bottle feeding prefer the Wide S-baby bottle; it minimises the chances of confusion between nipple and teat.
The choice between a Natural and Wide S-baby bottle also depends on what you prefer to hold.