Adreno GPU : Motorola Fire XT has a dedicated Graphics unit which promises to bring better graphics performance. The ground reality might vary but having a dedicated graphics processing unit is much better than have an extra 400 MHz on the main processor.
Front-facing camera : This is a big plus on Fire XT.
Price : The price on XT is very attractive. With its GPU it compares not necessarily competes with Google Nexus S, SE Xperia Mini, Xperia Mini Pro. Its front facing camera puts it alongside Micromax A85.