It really depends on which of the company would have better customer support, etc...
Both of the cards are basically same, and they would perform very similarly.
It is up to you to pick the model you like more.
According to newegg, ASUS provides a 3-year warranty as opposed to HIS 2-year.
I guess I might opt for ASUS since I've heard that feedback for HIS Support has been pretty bad. If anyone can confirm this, it looks like a no brainer.
Thanks for the replys
EDIT: Looking into it, it seems that support for both seem to be iffy. However, the 3-year warranty by ASUS seems like something I would not want to pass up.
1- Novuake is right, don't entirely trust newegg reviews.
2- Be sure that you really need a 3 year warranty, but usually if the product has a longer warranty, it means that the quality is better and they won't need to keep giving refunds.
3- Usually people will change their GPUs after 1-2 years, so keep that in mind, except if this is an one-term investment.