Well, there's actually multiple features that these devices can be measured by (and it's also the job of managers to balance the competing development resources to build and prioritize these).

Unsurprisingly, Google's device has the lead in general knowledge questions.

However, there are other aspects that people might care about, see this article for example:

http://thewirecutter.com/reviews/amazon-echo-vs-google-home/

Also, is it really necessary that because Google did something well, that the people building the Alexa should be shamed?