Samsung s5
+reliability of a flagship model produced by a pioneer mobile manufacturer
+water resistance
+fingerprint scanner
+external SD card
+higher pixel density
+good camera
To get like 4 packs visible in 2 weeks, you can do crunches 25x3 every other day. But to get washboard six packs abs, you should put more effort(more ab workout + low carb diet). Never do situps. It's a waste of time IMO.