One of the benefits I had thought that Supermetrics had over the Google Analytics plug in on Google Sheets is that it would help me avoid sampling. But even if I check the box "avoid sampling" on my query, it doesn't seem to have any effect. In addition, it doesn't tell me what the level of sampling is.
we have an article about the discrepancies / sampling on our Solutions side: https://support.supermetrics.com/support/solutions/articles/19000042916-discrepancies-in-google-analytics-results
Please go through the steps and report back if needed.