1, maturity time: black pearl is an early-maturing variety, and its fruit matures in the middle and late April every year; E 8 is a medium-mature variety, which began to mature in early June.

2. Appearance and taste: the skin of black pearl is purple and bright, the flesh is light yellow, the taste is particularly sweet, and it is refreshing and slag-melting; The fruit of Russian No.8 is full, shiny, round, sweet and chewy.

3. Fruit size: the black pearl fruit is large, with an average single fruit weight of 4.5 grams; The average fruit weight of E 8 12.9g is the largest fruit in cherry.

4. Transportation resistance: the transportation resistance of black pearls is average; Russian 8 is very durable and better than other varieties.