What is an International Version for Samsung devices? I'm trying to buy a Samsung Galaxy J7 and I'm between two options. 


one is: Samsung Galaxy J5 SM-J500H/DS GSM Factory Unlocked Smartphone, International Version 
other is : Samsung Galaxy J7 SM-J700H/DS GSM Factory Unlocked Smartphone-Android 5.1, 5.5-Inch 


I would like to know the differences between both of them (if there is any). Also, I want to know whether the phone is able to function well or not in my country, Ecuador South America.
This is two different models.
Look here about:
J5 VS J7