If you view pages with images or videos, you will likely find you use more data on faster connections. The reason is more images or portions of the videos will download before you view them. With the older 3G technology many pages would still be downloading data when you quit the page.
With the faster 4G technology far more data will be downloaded during the same time. It won't make much of a difference if you are downloading the entire data (such as a movie), but sites that download data in the background (such as Facebook) will use more.
