Now there is functionality available that you can perform a Spike Analysis when comparing two or more monitors.
To compare 2+ monitors in NUVI please navigate to this help article: https://help.nuvi.com/hc/en-us/articles/115002835532-Comparing-Monitors
When you are in the monitor comparison screen viewing your two or more monitors, if you see a spike that you are wanting to dive deeper into to analyze you can now drag your cursor over the spike and view the posts that created the spike. This is similar to the spike analysis that you can do on the Monitor's overview page (https://help.nuvi.com/hc/en-us/articles/360001493912-How-to-Create-a-Spike-Analysis)
You can label multiple spikes by monitor to make your comparison view more useful when targeting and investigating mention spikes between multiple monitors.