There were only a few alterations between the sketch and the final page. Ms. Keel's expression was adjusted a bit for Panel 3, and Ms. Grahz's drink was changed from Nitron to VMAX. We also "zoomed in" more on the last panel.
Despite this being a simple scene of the three characters in the faculty lounge, this page had a lot of extra details that took additional time, such as the front/back cover design of the magazine Ms. Grahz is reading.