This is not true. USB microphones do not have as high quality as XLR microphones connected to a usb interface. In general, USB mics have a lower signal to noise ratio (SNR) and a higher noise floor.

Does this matter for gaming or calls? Not really, as it will definitely sound better than crappy laptop or headphone mics. But there is a marked difference. The AT2020 usb mic doesn't even go up to 20khz. Not to mention the A-D conversion from a dedicated unit and the mic preamp are going to be better than the onboard electronics of a usb mic.