Synth vs Google BigQuery Data Transfer Service: What are the differences?

Synth: Realistic, synthetic test data for your app. It is the quickest way to create accurate synthetic clones of your entire data infrastructure It creates end-to-end synthetic data environments that look and behave exactly like your production data. Down to your data's content and database version.; Google BigQuery Data Transfer Service: Automate data movement from SaaS applications to Google BigQuery on a scheduled, managed basis. BigQuery Data Transfer Service lets you focus your efforts on analyzing your data. You can setup a data transfer with a few clicks. Your analytics team can lay the foundation for a data warehouse without writing a single line of code.

Synth and Google BigQuery Data Transfer Service can be categorized as "Data Transfer" tools.