I have already reviewed the 2015 model, the 2.0 version extensively. Here are some photos showing the differences between the two versions.
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2.0 on left, newer 3.0 on right
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New cross Strap attachment
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New cross strap end bracket
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New cross strap end bracket
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Strange section on the cross strap
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New MOLLE-Air panel
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Grey buttons
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Smaller Logo
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Bottom MOLLE webbing
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Larger size fits MacBookPro better
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Flimsier key holder above