I just looked at it, the price for the Hybrid and WaterFroce are exactly the same. But the WaterForce one seems better.
Gigabyte GeForce GTX 980Ti Xtreme Gaming WaterForce 6144MB GDDR5 PCI-Express Graphics Card
Core Clock: 1216MHz, Boost Clock: 1317MHz, Memory: 6144MB 7200MHz GDDR5, Stream Processors: 2816, SLI Ready, VR Ready, PhysX/CUDA Enabled, 3 Years...
£629.99*
EVGA GeForce GTX 980Ti Hybrid 6144MB GDDR5 PCI-Express Graphics Card (06G-P4-1996-KR)
Core Clock: 1140Hz, Boost Clock: 1228MHz, Memory: 6144MB 7010MHz GDDR5, Stream Processors: 2816, SLI Ready, VR Ready, PhysX/CUDA Enabled, 3 Years...
Was: £649.99\£629.99