Discrepancy between elastic agent and metricbeat data

Elastic Stack Beats
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I'm currently trying to decide to use metricbeat or elastic-agent for my system and I'm finding that there is quite a significant difference in the memory reported for each system.

Here are the screenshots

Screen Shot 2021-11-11 at 9.52.37 AM
Screen Shot 2021-11-11 at 9.52.37 AM1920×950 131 KB

Here is what docker reports for that container using docker stats

Screen Shot 2021-11-11 at 9.53.01 AM
Screen Shot 2021-11-11 at 9.53.01 AM1406×32 4.63 KB

Why is there this difference and should I assume that metricbeat is less accurate than the elastic-agent?

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