Samsung should be scared of Sony
Because if the leaks are true, then by all indications Sony's flagship is better. Better waterproofing, more attractive design, competitive display and chipset, FINALLY launching with the latest version of Android, competitive and useful features... and really, that S5 is HIDEOUS. Sony also added features like front facing stereo speakers and double tap to wake.
Now the only thing Sony is missing is competing in all US carriers and launching a big US centric marketing campaign. Samsung should be scared.