I don't believe so. Its about the same as the megapixel wars. Apple makes the intelligent choice to configure a megapixel rating with respect to the fidelity of their lens and CMOS, while Android makers wage megapixel wars. "My Android can capture more noise than your Android!"
The same is true for pixel density. You would have to be 4" from the device or use a magnifying glass to see the pixels on an iPhone 5 while Samsung and others are trying to one up a spec sheet number without asking if it even enhances usability. Higher pixel density means a brighter backlight is needed, so there is a fine balance between achieving a seamless look and saving battery life. Apple struck a fine balance with 326ppi.
With almost everything it constantly seems that Apple finds the right balance between spec and usability while other makers have a knee jerk reaction to add more more more. The S5 will have 10 finger print sensors!