What is the difference between a blackhead and a dilated pore of Winer?

What is the difference between a blackhead and a dilated pore of Winer?

The difference between a blackhead and a dilated pore of Winer is size. A dilated pore of Winer is a large blackhead. Both are formed because of clogged pores. A mixture of air and the exposed contents of the clogged pore turn the blemish black (oxidization).