Voltage-wise you can use anything from 7-15V.
For full USB power, you need about 3.75W, more doesn't hurt.
No 1 will power your axo board, but you might not get the maximum amperage on the USB port, meaning there may be some USB controllers you might not be able to power through the axo. For most, though, it should be fine, as it's just slightly below the recommended 3.75W.
No 2 is more powerful, but i didn't see whether the plug is center positive. This is the one thing to look out for as it could damage your board.