autofocus - Are cross-type focus points more accurate, or just faster?

Do cross type focus points achieve sharper photos than horizontal points or do they just grab focus faster?

Answer

They are capable of focusing on lines in two directions, so they will handle more situations. Focus points are generally either able to focus on strong horizontal lines or strong vertical lines, cross type can handle both, and thus can handle more scenes well.

If you had only vertical lines and tried using a vertical focus point(optimized for horizontal lines) it would have a hard time, but if you had horizontal lines, you wouldn't notice a significant difference between the vertical focus point and the cross type as they both can ideally handle the situation.