Microsoft seems to be a big fan of negative advertising, and the company has now published a video showing the Samsung Galaxy Tab 3 in comparison to its Surface RT.

The holiday spirit apparently has a bit of a Grinch attached to it for Microsoft, as the company's viral Scroogled campaign against Google stands proof.

Just a few days ago, Microsoft dropped a nasty and funny commercial starring the stars of reality TV show Pawn Stars, who explain to a customer why Google's Chromebooks are not real laptops.

As part of the same campaign of negative advertising, Microsoft also compared its Surface 2 to the iPad Air, and guess who came out as the winner in that ad. The superiority there consisted of the Surface 2's support for hands free control and multiple user accounts, something that Apple's latest tablet doesn't offer.

The company is now shifting its attention to another competitor, and this time the target is Samsung. Microsoft is now pushing an ad that compares its Surface RT with the Samsung Galaxy Tab 3 in terms of port connectivity.

The new commercial from Microsoft points out how the Samsung Galaxy Tab 3 can only connect to external displays and other devices through additional connectors. The Surface RT itself needs an adapter as well to connect to an external display, but Microsoft is really proud of its tablet's full-size USB port.

In other words, the Surface RT is better than the Samsung Galaxy Tab 3 because it has a full-size USB port, or so Microsoft seems to believe. The Galaxy Tab 3 has only one micro USB port to use for charging or for connecting external devices. With the Surface RT, meanwhile, users could connect an external display and charge the tablet at the same time.

It's not a fair commercial, as that would mean making a side-by-side comparison in all aspects the matter, from processing power to performance, from portability to apps and so on. It's just an ad, so naturally it favors the company behind it. Microsoft doesn't focus on the whole tablet experience here, it's just offering a brief comparison in the ports department. Check out the commercial below to see for yourself.