What is the best USB mic? According to a joint effort by Engadget and the Wirecutter, one USB mic triumphs as the best. There are tons of them on the market, and I've reviewed a few (see My Review Of The Blue Spark Digital USB And iOS Microphone, and Review of The Blue Snowball USB Microphone). But Engadget and Wirecutter selected...the envelope please...the Blue Yeti.
As with a lot of pieces of technical gear, there are several things you could rate to compare. In this little competition, they focused on the mic that made a voice sound the best with the least hassle. The Blue Yeti was the one that sounded the best when just plopping it down on a desk and recording. It was "the easiest way to sound good," as they put it.
They tested 25 different USB microphones and for the third year in a row, they chose the Yeti as the winner.
My personal favorite USB mic is the Samson C01U, which is also a large diaphragm condenser. I've never been a huge fan of the Yeti, truth be told.
Read all about the testing and how they made their choice here.