I asked, he said; "She has two kinds of lines: one magnificently Schieleian, one more scabby and experimental but interestingly unpredictable."
The incomparable and brilliant Matthew Adams had this to say;
"her linework, though very fluid and looking effortless, shows great design (so does her colour) and thoughtfullness, like every line is needed, not wasteful. it is very caligraphic, and you can see the influence of good manga art. it doesn't have the intense obsesiveness of some of zaks work, like you can sorta see zak comes from the fine art/painting field and sarah comes from the comics/manga field (of course this isn't obvious in all their art, it’s a generalisation and you can see the comics influence in zak's work and fine art influence in sarah's).