The reason Samdung has the larger screen is because they need the extra room inside the case for the bigger battery to power all the inferior off the shelf parts they use. Those parts and the inefficient, power hungry way android apps must compile/translate at runtime means battery power doesn't last as long as the iPhone battery power when all is equal, therefore throw in a bigger battery to extend battery life. Also, since Samdung can't seem to really innovate anything, they came up with the "brilliant" idea that bigger cellphones are better....thus the invention of the "phablet" that looks like a ridiculous slab when you hold it up to your ear.
All you people bashing Samsung are drunk on apple #$%$! I was one of you so I understand but after 5 years of iphones I now have the Note 2 and it KILLS THE IPHONE! Its not to big for me or my wife who laughed at me whe I first got it but weeks later she sold her pos iphone and got the note 2 and we are both over crapple now! Never again will I buy apple!