iCloud downloaded photos and time / date stamps

Hello,

I'll hopefully make some sense here, so here goes.

Downloading any photo from iCloud.com's Photos App then opening on a PC or Mac will show the time/date on the file from the point of download. However, if you right click the file and check the properties of the file it retains the timestamp of when the photo was taken in the details.

Now, my questions follow on from this...

Let's say I lose all my iCloud Photo devices (Mac, iPad and iPhone) in some freak occurrence, I now need to re-download all my photos from iCloud - approximately 80GB. That's not a problem, fine with that. Once they're all downloaded, they will all be timestamped with the time/date of the download initialization, so, here are my questions:

1. When they're all in the same folder, for example, if there are files with overalapping names, what happens then? Is the file appended with a '(1)' or something? Think about it, the Camera Roll goes up to IMG_9999 then returns to IMG_0001 - so there will definitely be files with the same file name if you have a large library. On your iPhone, for example, the files are stored in folders with alphanumeric names, each could in theory contain a file with the same filename as another file in a different folder. So, if the timestamps are the same on the newly downloaded files...then what happens?

2. Will all my photos be totally out of sync when viewed in a basic folder with basic viewing options? I'll probably see photos of my kids when they were babies immediately followed by them as toddlers and vice-versa; whereas on my devices (before I lost them 😉) the pics would run in the order I took them because of the timestamp data from when I snapped the photo.

3. If I now buy myself a new laptop, for example, and import all the files I downloaded from iCloud Photos into the Photos app, will the Photos app organize the photos based on the timestamp of the download or the timestamp from the file properties?

I've been reading some very good iCloud photos articles this morning (not published by Apple) and I still have not been able to get an answer. Without testing this out, I won't know for sure unless someone else has done this.

Anyone have any experience of a similar, albeit unfortunate, event?

Thanks

Gerry