Why do I see Updates in the Software Store App and in Software Updater

I've been use Software Updater periodically just to see what's new and update my PC. A bunch of times now I've started to notice that I see what appear to be different updates in the Software Store app compared to the Software Updater.

Above is an example from today.

I was under the impression that all drivers/firmware/os/software updates would be handled by the Software Updater.
Then to see the occasional item in the Software Store app that appears to be different from what I see in Software Updater is a curiosity.

What is it that I'm seeing?

Thanks all!

Flatpaks and snaps packages are handled by the software center.

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