the difference GTX Xtreme 970

[Alienu]

i well buy a Gigabyte Xtreme GTX 970 but i see some diffrence between GV-N970XTREME C-4GD vs. GV-N970XTREME -4GD . Core Clock Base/Boost 1051/1178 MHz vs. Base/Boost 1190/1342 MHz
It's important this difference?

 

[Proofy]

Yes it's the gpu's speed. Higher is better