I think there are differences between Pu 'er tea and black tea in four aspects: category, taste and aroma, processing technology and product appearance.

Pu 'er tea is a kind of reprocessed tea with mellow taste and unique fragrance. Black tea belongs to basic tea and tastes fresh and sweet.

Pu 'er is mainly processed by heap fermentation, which is loose tea or pressed tea; Black tea is withered, twisted and fermented, mainly loose tea.