Those are different bulbs, 26watt=27watt=different, 1600lumens=1300lumens=different, and 5500k=6500k=different. Comparing apples and orangesssss. Although they aren't really THAT different. They obviously are.

And every bulb package I have ever seen contains the Kelvin rating, it might just take you looking at the package a little harder then only looking at the name of the product.

I could be wrong, so look it up, but 6500k and 5500k is for veg, and the lower kelvin rating is for flower.

To answer which one is better, GE's are said to run hotter, but CFLs are CFLs. Buy some, they are cheap and be happy. HAPPY!!!!!!