I'm in the US, and I have a Chromecast, Google Home and a mini as well. My TV also has Roku built in.I'm not really happy using the Chromecast since my phone is the remote and I find that audio keeps cutting out. When audio cuts out, I need to unplug the HDMI and then reinsert it.
I just ordered a Mi Box 3s from ebay. Do these come with the play store? My primary apps will be YouTube TV, Play Movies and Amazon Video. I'll also use Google Assistant to control the house.
Yes, it has a play store but with only compatible apps.