Hi,
I am curious what is the difference between all the difference patch versions.
On steam there is a 2.5.17.0 release and here it is something like 1.3.2053!
What is the latest version and why is the number so different?

It is also 2.5.xx here but for some reason, it also has another numbering. There is practically no difference between versions as far as I know since I own them both on steam and on GoG.