Is AMD Opteron Hexa-Cores processors has Hyper-Threading Technology like Intel i9 Processor?

AMD does not have hyperthreading.

Personally, I would go for the Intel system. Intel make processors that are faster in almost all areas than AMD. Besides, no mainstream program can use all 6 core of the Phenom, and the y would benefit from the higher clock speed. Remember that the K edition of the 2600 is unlocked, so you can overclock it anyway. The difference between the 6970 and the 6950 is so negligible its unimportant. If you want, you can use AMD/ATI's Catalyst software to overclock it anyway. Finally, the Intel system has a larger hard disk at the same speed. If I were you, I'd add a cooling system to both of these builds. Hope this helps. Aaron

No

And there is no i9 currently. The next Intel line coming out will have 6 cores and 6 HT cores = 12. It will be the Core i7 980x and will be extreme edition only I believe. The i9 will probably be Sandy Bridge next year