Side By Side Comparison of Samsung Galaxy Ace NXT and Spice Stellar 451 3G. Compare Processor, display, RAM, Storage and other features here. You can quickly compare Samsung Galaxy Ace NXT and Spice Stellar 451 3G smartphones just by looking at their ratings and results showing "winner" and "runner up." There is also a short analysis comparing different features of Samsung Galaxy Ace NXT and . You can also look at each hardware feature individually to perform your analysis while comparing mobile phones.