Compatibility ECE25-E - ECE25-EUX > DELL 6420XFR

Hello,

I have a DELL Latitude E6420XFR laptop. This laptop has a mini PCI-E port on the motherboard.
I wanted to know if the EC25-E card is compatible with my laptop?

The goal is to install drivers and have 4G capability on my laptop.

Another question, I live in France, would it be better to use an EC25-E or EC25-EUX?

Thank you