These two are very different from each other. Apply TV is obviously a micro-console that will allow you to get apps easily from other devices. Sonos is one of the speakers that you can get so that you can listen to music more or hear more sounds. These two items can be used together and you will have a very rewarding experience in trying to entertain yourself.
These two items are known to be “smart devices.” There is a very big possibility that you will have a different viewing and listening experience from what you are used to just in case you would decide to use them both at the same time.