Park hours and crowd levels

Hi! We are visiting DW and Universal April 1-4. We plan to go to DW for 3 days and Universal for one day. I’m trying to decide which day to go to Universal. I notice the crowd projections for DW are similar for all 4 days, but Universal projection is much lower for Friday, April 3. Is that because the park closes early that day? I noticed some of the other crowd calendars project high crowds on that day.

For additional context: our hotel is not on property of either park. We will have express passes but are concerned about Hagrid wait times and crowd levels in Diagon Alley. We have been to Universal a couple of times, but it’s our first trip to Disney World. Thank you!