Art prints generally have a higher price tag than posters. Art prints and posters are two different things.
Wall Art Prints
 are generally large, colorful, and expensive. They are often sold in galleries or museums.
Art posters are usually smaller, less expensive, and created for a specific time and place. They can be found in stores, on walls in public places, or on the sides of buses. The main difference between an art print and a poster is that posters are meant to be displayed on walls while art prints are meant to be framed. Art prints are typically made of paper whereas posters are typically made of canvas, vinyl, or even cloth.