The difference between a poster and a poster mainly lies in their use and design. A poster is usually a high quality reproduction of an artwork, photograph or image. It is designed to be hung on the wall for decorative purposes. Posters are often printed on thicker, higher quality paper, which gives them a more professional look. They are often used to showcase artwork, artistic photography or high resolution images.
On the other hand, a poster is often designed for a more informative or promotional purpose. Posters are usually printed on lighter, cheaper paper. They are used to display information such as announcements, events, advertisements or promotional messages. Posters can be seen in public spaces such as streets, shops or entertainment venues. In summary, a poster is more focused on the aesthetic and decorative aspect, while a poster is mainly used to convey information or promotional messages.