CUDA Cores taking over the GPU Processor?

[techbullets]

Dear
I have just read this post and finally they vote for 560 TI instead of only 560

http://www.tomshardware.com/forum/337703-33-evga

I just need to know something, which is...Should i consider the CUDA core instead the GPU Proccessor?
as you know the 560 has 580 MHz while 560 TI has 822 MHz?

THX

 

[rgd1101]

http://www.tomshardware.com/reviews/geforce-gtx-560-amp-edition-gtx-560-directcu-ii-top,2944.html