One reads the sentence. One reads the book.
AutoCrit is at its best close to the prose. It counts your repeated words, flags weak phrasing, measures sentence variety, and compares your style to published books, which is genuinely useful when a draft is written and you are polishing.
DraftProse reads at the altitude above that. The Reader is about the shape of the whole manuscript, not the choice of word in a line: where dialogue clusters, how the plot architecture holds, whether a character drifts out of voice. Different altitude, different question.