The Maven comes with a 4.5-inch 854 x 480 pixel display, and is powered by the Snapdragon 400 SoC. It has 1GB of RAM and 8GB of on-board, expandable memory along with a 5 mega-pixel rear camera and a VGA front snapper. and runs Android 5.1 Lollipop out of the box. If you purchase this device, it’ll probably be for the 4G LTE connectivity it has on offer. The Maven has a 2100mAh non-removable battery
The Sonata 2 has a 4-inch 400 x 800 pixel screen and is powered by a 1.2GHz quad-core processor, It features the same 1GB RAM as the Maven, but has only 4GB of on-board storage. The rear camera is the same as the Maven with a 5 mega-pixel sensor, but this one has a better front camera in a 2 mega-pixel sensor. The phone is powered by a 1650mAh battery, while Android 4.4 KitKat takes care of the software side of things.
The Maven is priced US$60 from AT&T, while the Sonata 2 can be had for as low as US$30 with a Cricket Wireless plan.