Difference between split shift and continuous shift: what changes for company and employee

Two companies with the same collective agreement, the same 40-hour work week, and the same staff. One leaves at 15:00 and the other at 18:30. The difference is not in how much is worked, it is in how it is distributed. And that distribution changes the team's life, productivity, and, what almost no one looks at in time, the time tracking.