I rate my voice assistants by the quality of their "animal of the day"-- by this metric, Google Home is the clear winner. It's hard to even get Alexa to play you an animal sound, while Google has a really thoughtful Animal of the Day feature with sounds and animals facts.

My toddler listens to the animal of the day at least once a day on it, comprising >50% of my overall voice assistant usage, and I love to hope that I'm a weird outlier on some confused analyst's usage dashboard.