Blurring powder and pressed powder are both makeup products used to enhance the appearance of the skin, but they serve slightly different purposes and have different effects on the skin.

Blurring Powder: As the name suggests, blurring powder is designed to "blur" or soften the appearance of imperfections on the skin. It's often used to minimize the look of pores, fine lines, and wrinkles. This product usually contains silica or other light-diffusing ingredients that scatter light when it hits your skin, creating a soft-focus effect that makes imperfections less noticeable. Blurring powders can be translucent or lightly tinted and are typically applied after foundation and concealer.

Pressed Powder: Pressed powder, on the other hand, is primarily used to set makeup and reduce shine. It comes in a compact form and can be tinted to match your skin tone or translucent. Pressed powder often contains ingredients like talc or mica, which absorb excess oil and give the skin a matte finish. It's applied after foundation to set the makeup and can be reapplied throughout the day to control shine.

In summary, while both blurring powder and pressed powder can set makeup and reduce shine, blurring powder is specifically designed to minimize the appearance of skin imperfections, while pressed powder is more focused on oil control and maintaining a matte finish.