What is different between 2 files

[CLIFFEAT14048]

I am trying to figure out what is it in these 2 files that makes one bigger than the other. They have the same number of rows, columns, formulas, and are saved in the same format.

[vba_php]

why does that matter? this size difference in marginal. 9.6 KB vs 10.2 kb

[CLIFFEAT14048]

Those are just small portions of the "real" files, which are much bigger. I didn't want to upload them because of their size, which have a difference of 300k. I want the smallest size because I download these files daily, which, over time, will overload my disk capacity. What I don't understand is why there is such a difference in sizes because the same EXACT information is in both files and they are saved in the same EXACT extension. I want to find out if there is some way I can find out the properties of each file which shows everything about a file...like right clicking on a file in File Explorer and choosing Properties. Is there a feature like that in Excel?