I vote for google analytics. It’s simpler to use, and more people are acquainted with it.
Belkins lead generation agency I used to work with used it, and it was more convenient for me, as for a customer, to read their reports in Google Analytics because I am more aquatinted with this architecture in general. It’s important to make those reports as understandable as possible because this way, you can be surer the client with work with you again. If they don’t understand a part or the entire report you provided, they might not understand the benefits of your work and be reluctant to hire you again.
