Samsung revealed pricing information and release dates for refreshed versions of its Galaxy-brand tablet at a media event in San Francisco Wednesday, stressing the inclusion of features and form factors that cannot be had with Apple's iPad. The company first demonstrated its Galaxy Tab 2 line at the Mobile World Congress in February.

The Galaxy Tab 2 line includes the Galaxy Tab 2 10.1, successor to Samsung's original Galaxy Tab, and the Galaxy Tab 2 7.0, a revision of the Galaxy Tab 7.0 Plus that challenges Amazon's Kindle more than Apple's iPad.

Asked about demand for a 7-inch tablet--a form factor that former Apple CEO Steve Jobs insisted was too small--a Samsung spokesperson said customers want choice. "One size fits all is not enough," he said.

The 7-inch version of the Galaxy Tab 2 features a 1024 x 600-pixel screen and internal storage capacity of 8 GB, which can be expanded to 40 GB using a 32-GB microSDHC card.

In addition, Samsung has partnered with cloud storage company Dropbox to provide tablet buyers with 50 GB of free online storage for a year, a $99 value. The tablet runs Android 4.0 (Ice Cream Sandwich) and sports a dual-core 1-GHz processor.

[ Learn more about Samsung's tablet plans revealed at MWC. Read Samsung Android Tablet Strategy Puzzles. ]

The 10-inch Galaxy Tab 2 comes with a 1280 x 800-pixel screen and twice as much internal storage, 16 GB, plus whatever the owner chooses to add via microSDHC card. Like its smaller sibling, it runs Android 4.0 using a dual-core 1-GHz processor. The Dropbox deal is available with the larger tablet, too.

Both versions come with a 3.2 megapixel rear-facing camera and a VGA-quality camera in front.

While Samsung's latest tablets may have features that the iPad doesn't--an external storage slot, an infrared sensor, and stereo speakers--their screens fall short of the new iPad's Retina display.

Both models include a built-in IR sensor, which can be used with Samsung's Smart Remote software for mirroring tablet content on recent vintage Samsung TVs (2011+ Series 7000 LED models) and for controlling other electronics.

Samsung will begin accepting orders May 4 for its $400 10-inch tablet and plans to make the devices available May 13. The 7-inch tablet lists for $250 and Samsung intends to begin taking orders Thursday with availability planned for April 22.

See the future of business technology at Interop Las Vegas, May 6-10. It's the best place to learn how cloud computing, mobile, video, virtualization, and other key technologies work together to drive business. Register today with priority code CPQCNL07 to get a free Expo Pass or to save 25% on Flex and Conference passes..