Side By Side Comparison of Lava Iris 408e and Spice Smart Flo Mettle 4X. Compare Processor, display, RAM, Storage and other features here. You can quickly compare Lava Iris 408e and Spice Smart Flo Mettle 4X smartphones just by looking at their ratings and results showing "winner" and "runner up." There is also a short analysis comparing different features of Lava Iris 408e and . You can also look at each hardware feature individually to perform your analysis while comparing mobile phones.