Horseshoe magnets are just bar magnets bent in a U shape. The U shape makes the magnet stronger by pointing the poles in the same direction. Originally created as a replacement for the bar magnet, this shape has become the universal symbol for magnets. It can be used to pick up metal objects of any size depending on the strength of the horseshoe magnet. For example, small horseshoes can collect paper clips while industrial-sized horseshoe magnets are used in construction and engineering to pick up large pieces of heavy metal. Horseshoe magnets are also used at the bottom of pendulums.
both are similar.