1st Blanks vs 2nd Blanks

What’s the difference between the two? I know air bubbles and crooked stringers can be a problem, as well as the foam being a bit dry. But I shaped a 2nd recently and couldn’t find anything wrong with it. Am I missing something?

could have been soft foam? You wouldn’t have noticed it, unless you put it up to a light, or squeezed it. No big deal, except it suck resin up a bit.

Thanks for the suggestion. Will check this one more closely next time.