While both are North Germanic languages, Swedish and Norwegian accents differ strikingly in prosody—the "music" of speech.
Swedish intonation is relatively limited in variation, giving it a somewhat monotonous baseline. However, it features a distinctive two-tone pitch accent (acute and grave) that creates a subtle, rising-falling melody within words—often described as "sing-song." This pitch accent system is notoriously difficult for learners to master.
Norwegian is frequently called the world's most beautiful accent. It shares a pitch accent system but employs a wider tonal range and more dynamic stress patterns. The result is a soft, lilting, almost lyrical quality that can sound gently dramatic to foreign ears.
In short: Swedish feels measured and tonal; Norwegian feels fluid and melodic.