Deuter Aircontact X vs Deuter Aircontact Core Backpacks

https://mountainsforeverybody.com/deuter-aircontact-x-vs-deuter-aircontact-core-backpacks
Both Deuter Aircontact X and Deuter Aircontact Core backpacks are new series which this brand launched recently. They share many common features but there are also important differences. So which is better?
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