The same Specs：
Both are powered by 832MHz processor and runs Android 2.3 OS with TocuhWiz UI, have two SIM card slots, 3 Megapixel camera, front VGA camera for video chat.
WiFi connectivity, microSD card slot (a 2GB card included), GPS support, FM radio and Bluetooth. support quad-band EDGE/GPRS and dual-band HSDPA 7.2Mbps network.
The Different is :
GALAXY Y DUOS has a 3.14-inch touchscreen
GALAXY Y DUOS Pro version 2.6-inch touchscreen and a QWERTY keyboard.