Just curious which of these two cards would be better. I'm looking at a R7 250 (http://pcpartpicker.com/part/xfx-video-card-r7250aelf4), which isn't very powerful, but has 4GB VRAM. Just curious if that would give it an advantage over the average 750, which has 1GB VRAM. The 270 is $109, the 750 is $117. Thanks.