Side By Side Comparison of HTC Desire 820s and HTC Desire 728 Dual SIM. Compare Processor, display, RAM, Storage and other features here. You can quickly compare HTC Desire 820s and HTC Desire 728 Dual SIM smartphones just by looking at their ratings and results showing "winner" and "runner up." There is also a short analysis comparing different features of HTC Desire 820s and . You can also look at each hardware feature individually to perform your analysis while comparing mobile phones.