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I recently faced the same problem and chose to go with the economy as they were the same design and size as the food saver bags I used previously. I wanted to compare apples to apples so to speak and have purchased my last food saver bags. Lisa's bags even paying shipping are a much better deal cost wise for at least the same quality.
I have always bought the premium bags. If you use a lot of bags buy by the case. She will mix a case if you want both sizes. Good price and good service. OH, and the bags work great. CF