Bottles. Pasagot pls

Planning to switch to other bottle's brand. We're using Avent Natural since nb si lo. Gusto ko itry si Pigeon. Tanong ko lang, (applies to avent na din po). Ano ba talaga pinagkaiba ng wideneck sa slim/classic? Curious lang po. Mas malambot ba ang wideneck? Or may other benefits ba? Enlighten me pls.🙂