Mx518 Vs Mx518se

Hi.. I'm looking to purchase a new gaming mouse. I'm looking for the best gaming mouse out there and I think that is the Logitech MX518. I've had great experiences with this particular mouse, but throughout the moving process it was damaged... Now, as I browse through the internet I found that the MX518 SE is significantly cheaper than the MX518. I've tried researching upon the differences, but I'm not too sure if what I read is a reliable source. I'm now sourcing for your opinion.. What are the differences between the MX518 and MX518 SE? I was VERY pleased with the original MX518 so I will like to continue down this route. Thanks for the advice.