Side By Side Comparison of LG Optimus L3 Dual and Karbonn KT51. Compare Processor, display, RAM, Storage and other features here. You can quickly compare LG Optimus L3 Dual and Karbonn KT51 smartphones just by looking at their ratings and results showing "winner" and "runner up." There is also a short analysis comparing different features of LG Optimus L3 Dual and . You can also look at each hardware feature individually to perform your analysis while comparing mobile phones.