Got a Google Home Hub free with my mobile but I don't reckon much to it. Can the Alexa do stuff the Google cant?
95% of my usage is to just play music. I'm very impressed with Amazon's music service (I don't listen to anything popular but I struggle to flummox it on music requests) and I have every device on a multi-room speaker group so wherever I go in the house the same song is playing, perfectly in sync. Note that you have to use either the inbuilt speaker or the audio jack to do this, bluetooth speakers introduce lag so an Echo can't be in a multi-room group and have a connected bluetooth speaker at the same time (you also can't easily run it through a PC's mic/line in and then out of the speakers as the soundcard will also introduce a slight but annoyingly noticeable delay - I bought tiny USB-powered Behringer mixers to get around this in the rooms where I have HTPCs).
The other 5% is using it to turn on and off the limited number of smart bulbs/plugs I have in the house. I've been looking to expand this recently but I only have a Hive hub right now which doesn't have a lot of cool features. Really for fun with smart lighting you need Hue, but looking at what you can do the temptation would be to spend a ton of money on crazy lighting everywhere*.
A friend of mine is just starting with Google Home. She has Spotify already which is probably on par with Amazon, and most of the smart home stuff runs through seperate hubs/skills that are likely compatible with both setups.
* I'd love to do this with Hue (though I'd hide the bulbs as I think having them flashing inyour eyeline would be distracting), but my living room space isn't really ideal for it in this house. When I move though, I'm having a dedicated home cinema room: