First two: Old two-tab UI, Last two: With the new Highlights tab (Source: Android Police)
Google Contacts is getting refreshed to make it easier to reach the people you get in touch with the most. The app adds a new Highlights tab that brings up your favourite and recently searched contacts or those that you recently talked to. It's possible to clear your recent searches if you want. Google Contacts won't default to the Highlights tab, but it'll continue from the last tab you were on. This new feature is coming as a server-side update to all users via version 3.82.22 of the app.