Sony’s split-screen Android device (which Sony insists is a tablet) will officially and exclusively launch in the U.S. via AT&T at an unspecified date later this year, in September at the earliest. The “Stealth Blue” version of the Sony Ericsson Xperia play, on the other hand, will be arriving also on AT&T “soon,” although not as an exclusive launch on the carrier, since Verizon beat AT&T to it last May.

The Sony Tablet S2 features two 5.5-inch screens (each one having a pixel resolution of 1024×480) in a foldable-book (clamshell) form factor and is intended for mobile communication and entertainment use. Sony’s other odd-shaped Android tablet, the Sony Tablet S1, is shaped like a folded newspaper/magazine and is intended for rich media entertainment. The shapes and designs of the two Android devices are undeniably unprecedented.

The two tablets come packed with Android 3.0 Honeycomb, according to reports, but will likely sport either Android 3.1 Honeycomb, or Android 3.2 Honeycomb when the final versions launch.

In contrast to the Sony Tablet S2, the Sony Ericsson Xperia play has been getting more interest from users, chiefly because it has great potential for hard-core gaming, being a PlayStation Phone. The 4-inch gaming phone will have Android 2.3 Gingerbread running on top of a 1-GHz Qualcomm mobile processor.

Both the Sony Tablet S2 and the Sony Ericsson Xperia play are capable of using AT&T’s 4G HSPA+ network. Both devices also support Wi-Fi connections.

Which of these two is it gonna be for you?