Report difference for 2 users

I and another user generates the report for the past week, a cost estimation report. Numbers in this report are different regardless of the totally same set up (we had a screen sharing call).

Difference is very minor, but still it exists. What can be the reason? Our report settings are totally the same.

It’s because of time zone. In my team the same situation happens sometime, we have a manager located in Australia while most of the team is in Europe, due tot time dependencies our reports vary sometimes (7 or 8 hours of difference).