Which lights would be better?

They are both the same -- they each have 2 T5 bulbs. So which one is better comes down to your preference. How long is your tank? A 2-bulb fixture may be too low on light for a lot of corals.
 
Well the second link comes in a 30" length, the first one does not. So if you were going to choose between the two, the one that fits your tank would look the best.
 
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