That hub is not up to the job. 2.5A (less power used by the hub) over seven ports is about enough for a cluster of zero/zeroW.
That charging station may work. It depends on how good the regulation is and whether it requires any negotiation with the device before it will provide the full current.
That said, I'd go with neither. I'd use an ATX PC PSU. Cheap, well regulated, and lots of current available.
Attempts to contact me outside of thes forums will be ignored unless signed in triplicate, sent in, sent back, queried, lost, found, subjected to public enquiry, lost again, and finally buried in soft peat for three months and recycled as firelighters