Regarding various product updates using the Install Manager

Is there any way to find out what exactly the "updates" are for some products that show up in the Install Manager?

For context, I am on a limited data plan, so I'm always in need of balancing what I download and what I don't, and so because of this I''ve had several products sitting at the top of my install manager for some time now that I've yet to actually download, due to the amount of data they would collectively require, and not having any idea of what the updates themselves are for, given that I've not had any noticeable problems with using said products as is. I've tried opening up the product documentation pages for some of them, but nothing seems to show up in known/resolved issues, so I'm seemingly in the dark here.

As an example, I've had the Book Smart Outfit since release, and I've not had any trouble using it, however there's a near 1GB update available. Now 1Gb isn't much, but that's just one product out of several that quickly add up. Any help would be greatly appreciated.