Difference in amount of browsing data between ChromeOS device & Windows 10 device

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I had posted the following question in a different group and one commenter suggested that I come here with it. FWIW, I have an Acer CXI5 Chromebox and a Windows 10 desktop; I currently only use the Chromebox for online tasks and got it because of the impending end of MS security updates for Windows 10. I'm relatively new to ChromeOS.

When I visit websites I've visited in the past with the Win 10 desktop (and *not* using Incognito with either device), and I go to delete browsing data, I've noticed there's a higher number of MB's of cached images and files than what I experienced with the Win 10 desktop on those *same* sites. Does anyone know why would that be the case?