Main Difference
The main difference between Pomelo and Yuzu is that the Pomelo is a species of plant, pomelo and Yuzu is a citrus fruit and plant.
Pomelo
The pomelo, Citrus maxima or Citrus grandis, is the largest citrus fruit from the Rutaceae family. It is a natural (non-hybrid) citrus fruit, similar in appearance to a large grapefruit, native to South and Southeast Asia. The pomelo is one of the original citrus species from which the rest of cultivated citrus have been hybridized. The popular fruit is used in many festive celebrations throughout Southeast Asia.
Yuzu
Yuzu (Citrus junos, from Japanese ユズ or 柚子) is a citrus fruit and plant in the family Rutaceae. It is called yuja (from Korean 유자) in Korean cuisine. Both Japanese yuzu and Korean yuja are cognates of the Chinese yòuzi (柚子), but the Mandarin word refers to the pomelo. Yuzu is called xiāngchéng (香橙) in Mandarin.
Pomelo (noun)
The large fruit of the Citrus maxima (syn. C. grandis), native to South Asia and Southeast Asia, with a thick green or yellow rind, a thick white pith, and semi-sweet translucent pale flesh.
“vern|jabong|q1=India|pampelmoes|q2=South Africa|shaddock|q3=chiefly Caribbean|Chinese grapefruit”
Pomelo (noun)
The tree which produces this fruit.
Pomelo (noun)
Any of the citrus hybrids derived from this tree, particularly the grapefruit.
“grapefruit”
Yuzu (noun)
A citrus fruit originating in East Asia, Citrus ichangensis x Citrus reticulata var. austera.
Pomelo (noun)
the largest of the citrus fruits, with a thick yellow skin and bitter pulp which resembles grapefruit in flavour.
Pomelo (noun)
the tree which bears the pomelo.
Yuzu (noun)
a round, yellowish citrus fruit with fragrant, acidic juice, used chiefly as a flavouring
“a version of eggs Benedict made with smoked salmon and hollandaise sauce flavoured with yuzu”
Yuzu (noun)
the citrus tree that bears the yuzu, originating in China and widely cultivated in Japan and Korea.