How does Hungarian vowel harmony compare with Finnish vowel harmony?

Hungarian and Finnish vowel harmony systems are essentially the same, both requiring that vowels within a word agree in terms of frontness or backness. In both languages, this feature dictates that suffixes must often shift their vowels to match the stem of the word to maintain harmony.12

The primary difference between the two systems lies in minor phonological details:

• Finnish: Vowels are categorized such that the set {ü, ö, ä} prohibits the use of {u, o, a} within a word. The unrounded front vowels, i and e, are neutral and may occur with either set.1
• Hungarian: Vowels are classified into three groups: back vowels (a, á, o, ó, u, ú), front rounded vowels (ö, ő, ü, ű), and front unrounded vowels (e, é, i, í). While back vowels and front rounded vowels cannot occur together, Hungarian specifically uses short e as the front vowel counterpart to a.12

Additionally, while both languages utilize standard vowel harmony, Hungarian also exhibits an assimilation of lip rounding in certain cases, such as in the allative case, which is distinct from the standard front-back harmony.1