This is a downgraded SGS.

Processor and GPU are downgraded to the equivalent of the Milestone 2 (TI OMAP 0630 processor and SGX530 GPU compared to Hummingbird processor and SGX540 GPU on the normal GS). RAM from 512MB dropped to 478MB. Not to mention SLCD compared to SuperAMOLED on the normal Galaxy S.

Although its thicker, the battery is slightly bigger to compensate for the SLCD. Rest of the specs are the same.