Its surface-mounted (SMD) processor makes this Arduino Uno Rev3 more resistant to external aggressions, including vibration. However, this obviously means that it’s much more complicated to remove the microcontroller on which the programming board is based, should you ever wish to change your Arduino’s “brain”.
Another difference in relation to the Rev1 and Rev2 versions concerns the ATmega16U2 chip, which manages the USB connection: the FTDI USB-to-serial driver, which makes it easier to connect your board to your computer, has been removed.
