Vodafone (NYSE: VOD) said it will start selling the Tab in all of its European markets and a number of its other markets worldwide in October, and the device is expected to launch in the U.S. over the next few months, but it’s unclear on which carriers.

The Galaxy Tab is basically a larger version of the Samsung Galaxy S phone line, which has been selling briskly in the U.S. through a number of carriers.

The device differs from the iPad in a number of ways. Samsung will primarily be selling it through wireless carriers, implying that most will come bundled with a 3G data plan and offer a subsidized price of between $200 and $300. In addition the screen is 7-inches, or smaller than the iPad, making it easier to hold and use while on the go. The device comes with Adobe (NSDQ: ADBE) Flash, unlike the iPad. And, because of the 3G connectivity, it will be able to make calls, including video conferencing (based on the forward and rear-facing cameras, which the iPad also doesn’t have.)

The one major disadvantage is applications. Apple has already been able to line-up a catalog of 25,000 applications for the iPad. While Android Market has grown tremendously in recent months, the applications won’t necessarily support the larger format.