The differences between the two models aren't substantive. For starters, they look identical. The changes you do get on the Nest Mini are new LEDs on the side volume buttons, a wall mount indentation on the back, and a new machine learning chip that promises increased responsiveness. In our review though, we couldn't see a major difference in performance. The Nest Mini does have a louder speaker though.
At £19.99 the Home Mini remains a great introduction to smartening up your home with Google Assistant. The speaker can respond to your questions, set alarms, play music, cast videos and connect with smart light switches and heating systems. See our full Google Home mini review.
Head to My Memory to pick up the Home Mini for £19.99. You can see the current prices for the Google Home Mini from other retailers below: