I discovered this by testing my mini golf entry, I have used particles quite extensively and had to tune the results to what I wanted. So I was noticing some differences between the original build and the exported/imported svo.json thats hosted on the marketplace server.
Some very noticeable changes, in some cases numbers less than 1 (0.2) were rounded up to 1
but in other cases it looks like some values just got replaced by the previous values.
The end result is the SVO copy doesnt look the same as my original, for particles.