1080i and 1080p are both high-definition (HD) video formats, but they differ in the way they display images. 1080i uses interlacing, which means that it displays alternating lines of the image, while 1080p uses progressive scanning, which means that it displays the entire image at once.
This can make 1080p images appear smoother and sharper than 1080i images, especially when there is a lot of movement in the scene.
However, 1080i TVs can still produce excellent image quality, especially if you are sitting far away from the TV or if you have a smaller screen size. Additionally, 1080i TVs are often less expensive than 1080p TVs, so they may be a good option if you are on a budget.