While iOS 14 beta is barely out of the box from WWDC this year In Depth Tech Reviews has already posted a video of their initial comparison of Siri on iOS 14 beta and the latest version Google Assistant.
Despite all the enhancements Apple has made to iOS, Siri still does poorly when compared to Google Assistant. It does ok when completing relatively simple tasks such as setting reminders, alarms or asking basic questions. But when it comes to more complex tasks such as retrieving information from the web, multiple step instructions or any form of low interactivity it does pretty poorly.
Check out the video below and decide for yourself if this is the voice platform you want running your smart home.