ELK and istio question

Hi there, I’m new to Istio, and have been trying to to understand a few things with how to get logs from our core applications. I know that Istio has logging information that I can pull into our ELK stack. I am trying to understand if istio adds anything to the proper monitoring of these apps, or will the need to be simply treated as two different sources for the Logstash. Just really new to much of this, so would appreciate some help with how to treat log aggregation in this type of environment.