Well Dual indicates that this is the Dual SIM version of the phones revealed at MWC 2013 and they are now available at Flipkart. The L7 II Dual costs almost twice the price of L3 II Dual which is available at 7899 INR. L3 II Dual has the screen size of 3.2 inches and the single core processor of 1GHz and it also does not have any secondary camera. Now if it is compared with Huawei Ascend Y300 then at the similar price you will have better screen size and the availability of the secondary camera which will be a better offer the users. The LG Optimus L7 II Dual has the screen size of 4.3 inches with the same internet + external memory storage capacity, connectivity features and OS to that of L3 II Dual but these things are available at the price of 14,990 INR. It has got the secondary camera support of 0.3 MP and the primary camera support of 8MP with the Dual Core processor clocked the same frequency as it was in Optimus L3 II Dual. Now most of these features available in Huawei Ascend Y300 but the battery is a problem there which is 2460 mAh in L7 II Dual and 1540mAh of L3 II Dual (which is decent as per the screen size).

Buy LG Optimus L3 II Dual form here | Buy LG Optimus L7 II Dual form here