Welcome to the TH community, Iyadnajjar!
Both of these drives could be used for gaming because they incorporate 7,200 RPM. However, WD's specifically tuned hard drive for performance is the WD Black. It also has 7,200 RPM but it's specifically designed to withstand the gaming workload and demanding applications in your system.
The WD Black also comes with 5-year limited warranty and features a dual-core processor that offers twice the capability to maximize drive performance.
You should check more details about this HDD on our official website here:
http://products.wdc.com/support/kb.ashx?id=kv5C9O
And here's the comparison page of all the internal desktop consumer storage solutions:
http://products.wdc.com/support/kb.ashx?id=AeWHxD
As well as the datacenter (enterprise) hard drives:
http://products.wdc.com/support/kb.ashx?id=4nxVCo
Hope it helps. Keep us posted if you have more questions!
Happy Holidays!
SuperSoph_WD