this is my second google mini speaker this nest mini is a little better in sound quality compared to the first version of google mini speaker however the first version of mini speaker is a bit louder also the first version of google mini speaker is powered by micro usb adaptor so you can use a power bank and make it portable the micro usb has been replaced on nest mini with a round pin to ensure people dont use the mini speaker as a portable speaker but rather buy one for each roo