The Byakugan has the ability to see the chakra pathway of a user clearly. This is an ability this eye shares with the Sharingan, however, the level at which they see it very different. While the Sharingan can also see the chakra pathway, it can only do so at a basic level.

Can Sharingan see chakra flow?

Abilities. The Sharingan grants the wielder two broad abilities: the "Eye of Insight" (洞察眼, Dōsatsugan) and the "Eye of Hypnotism" (催眠眼, Saimingan). ... "Eye of Insight" The user can see chakra, giving it colour in order to distinguish it by its composition and source.

Can Sasuke see chakra?

A sensory shinobi is someone who can sense chakra in other beings. ... For some reason, Sasuke is able to sense when Naruto builds up his chakra from the nine-tailed beast in their final battle against one another. Perhaps it's because of how often Sasuke had already been in Naruto's head.