Discrepancy between Revenue Explorer Report and Email Performance Report - Need help to understand what causing this :(
Hi,
I'm analysing my email campaign performance report from July 2021 to date (15th Nov). I created email performance report by filtering the necessary program to the region and business unit that I'm interested in. I also filter the email send data to be 1st July 21 - 15th Nov 22.
I randomly compared the performance of one of the emails in the email performance report and revenue explorer report, where I noticed that there is a huge discrepancy between the number of sent, delivered, and clicks between these two reports for this particular email. Below are the screenshots for reference.
Below is the report for from email marketing report:

Below is revenue explorer report:

As you can see above, there is a huge discrepancy in sent and delivered between these two reports. I understand that we have data retention policy for marketo, where email send and delivered data will only be retained for 90 days. Could it be the reason that causing this issue?
Thanks for your advice!