What is the best way to arrange counters (analytics) on several identical sites?

Question

Google Analytics

Hey!
There are several identical sites in different languages, by geographic domain for each. The engine is the same, and the templates are identical, just a separate domain for each country with its own interface language. You need to track them all with Yandex Metrica and Google Analytics, including e-commerce, goals, conversions, A / B testing, etc.
Please tell me the best option:

• create and install a separate counter for each site, view reports separately
  
• use a common counter code for all sites, register (allow) all domains in its settings, in reports, if necessary, filter by a specific domain, or view consolidated data
  

There is not enough experience to calculate the pros and cons of each option so as not to regret later.

Answer 1

You wrote everything correctly yourself - the second option is needed if you need consolidated statistics (I'm talking about GA). And to answer the question - is it necessary, only you can. In YM, in any case, you will have different counters, and aggregated statistics will be available using labels.

Answer 2

Comprehensive information about the pros and cons of each option is presented in this video .
Optional:
- https://support.google.com/analytics/answer/103434...
- https://moz.com/blog/cross-domain-subdomain-tracki...