Why is the percentage of visits from Yandex 20% from the 1st site, and 60% from the other, while the sites are almost the same?

Question

Yandex

There are two sites on the same topics.
Site A has better positions in Google than
site B Site B has better positions in Yash than site A

At the same time, site B has more hits from Google (76% from Google)
And site A has more hits from Yashi (70% from Yandex)

How is it possible?