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WEBENCH® Tools/TPS62748: most efficient DC-DC converter with dual output

pragash sangaran78
Genius 3660 points

Part Number: TPS62748
Other Parts Discussed in Thread: TPS62740, , TPS62840

Tool/software: WEBENCH® Design Tools

I'm in search of the most efficient DC-DC converter with a dual output. I come across TPS62748 and TPS62740. When compare the datasheet, both regulators are almost the same. However, when I search in the TI link, TPS62740 seems to have lower Iq, so it supposed to be more efficient. Is it true? In the datasheet quiescent current of both the regulators are 360nA whereas in the link, TPS62740 exhibits 300nA and TPS62748 exhibits 360nA. Which one do I trust? The link or the datasheet? Please clarify. 

http://www.ti.com/power-management/non-isolated-dc-dc-switching-regulators/step-down-buck/buck-converter-integrated-switch/products.html#p238min=1.5;4.2&p238max=4.2;6&p634min=-17;1.8&p634max=1.8;92&p451max=0.05;0.5&p236typ=0.00006;0.2&p212max=51.02040816326531;100&sort=p236typ;asc