In a nutshell, if you want round by round financing details, Deal Search is for you. Companies on your search may be repeated if the company has had multiple rounds of funding that fit your criteria. If you don't care about round details and just want company information on one row, Company Search is what you want to use.
The diagram below shows the main similarities and differences.
If you have any questions or concerns, please reach out to us at firstname.lastname@example.org.