12mp P&S

[Romphotog]

Kodak EasyShare M381 12MP
B&H #KOM381BLGR • MFR #1147255
Our Price:
$140.95
or
Samsung SL620
B&H #SASL620B • MFR #EC-SL620BBP/US
Our Price:
$118.95

Both have same specs, but the Kodak is $20 more. What justifies it?
Is 12mp really needed? Is it too much for a small P&S sensor. I dont make too many prints.
I read that above 6mp on a P&S is a waste and reduces pixel quality as more pixels are crammed onto a small sensor.