of course the ASUS GTX 750 TI cause it is better than the MSI one
it has a higher base clock vs MSI
it has a higher boost clock vs MSI
it achieves better fps vs MSI
better cooling of gpu vs MSI
it is ASUS (can't go wrong)
Here is a comparision of all the 750 TI cards :
http://thepcenthusiast.com/asus-evga-gigabyte-and-msi-gtx-750-ti-compared/