AMP: Subdomain vs. Folder vs. Parameter

Hey guys,

I was wondering if there is any best practice for the URL structure of AMP pages?
If you use a subdomain or a folder in the upper level, you can have a better possibility for analysing on Sistrix and Google Analytics.

But I was wondering if there is a benefit for Google, if you put your AMP pages under the root domain www instead of subdomain for example? Anyone tried both variants on their website maybe?

Thanks!

I'd just go on root domain. Don't really see the point in making an amp website on a subdomein. It's just splitting up your domain authority

Here's G guidance to AMP urls: https://support.google.com/webmasters/answer/6340290?hl=en

Basically, Your AMP URL scheme should make sense to the user.