GL-MT300A int. vs ext. anthenna

What difference does it make the 2dbi or 5dbi antenna vs the internal one in terms of reception and range for the GL-MT300A? Did anyone made tests or are there any available online?

Do the external 2di antennas (such as on the GL-MT300A-EXT) make any difference to the wireless range over the internal antennas (such as on the GL-MT300A) ?