Looks like it is an ARM v7 CPU in the cheaper device (ARM v6 S1 SOC CPU cores don't go up to 1GHz), which is good to see as the baseline.
The Peak: CPU Qualcomm Snapdragon S4 1.2Ghz x2. UMTS 2100/1900/900 (3G HSPA). GSM 850/900/1800/1900 (2G EDGE). Screen 4.3" qHD IPS Multitouch. Camera 8 MP (back) + 2 MP (front). 4 GB (ROM) and 512 (RAM). MicroSD, Wifi N, Light & Prox. Sensor, G-Sensor, GPS, MicroUSB, Flash (camera). Battery 1800 mAh.