Firebase is Google’s platform for developing mobile app development. Firebase Analytics is one of the tools that bundles with it. It is possible to send events and screen views to Google Analytics, and keep using Google Analytics even if you have decided to use Firebase as your development platform.
The two products continue to be developed, thus feature analysis that is done today will probably be less relevant in a year, but the main differences are as following:
Both of the tools have attribution models, funnel analysis and cohorts.
The biggest disadvantage of Google Analytics is that unless you are willing to spend $100k per year, you will not be able to get information on a user level.
You can easily export the data from Firebase Analytics to BigQuery, and from there the data can start its journey towards your data warehouse, a BI tool such as Tableau or even a simple CSV file.
Firebase Analytics, combined with Google BigQuery, enables you to make decisions that Google Analytics cannot support.
Both Firebase Analytics and Google Analytics are solid and proven tools. Our recommendation is to use Firebase Analytics for mobile apps and Google Analytics for websites.