What is the difference in Organic step 1 and step 2 bananas baby food?

I accidentally bought natures best ( or great start, I cant remember) organic bananas in step 2, it seems the only difference is there is ten more calories, is there any other difference between step 1 and 2?
Update: Thats it! Earth's best! So I definetly shouldn't give it to my baby without giving her the step one first.
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