How to read car charger input current specification?
No, you have to read the description different:

#1) Input 12-24V means it is capable for normal cars (12-14V) and Trucks (24V) and the 5.6A Max. is most likely the maximum allowed current before the internal fuse blows off.

#2) Input 11-15V means it is only usable for cars (no Trucks) and a maximum current of 10A before the internal fuse blows off.

so ... they are both usable for your need unless you own a Truck, then you should take #1.