comparison of LG Tab Book Duo and Lava M Tab. Compare Processor, display, RAM, Storage and other features here. You can quickly compare LG Tab Book Duo and Lava M Tab 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 Tab Book Duo and . You can also look at each hardware feature individually to perform your analysis while comparing mobile phones.