what is the diffirence between these two cards?

http://www.newegg.ca/Special/ShellShocker.aspx?cm_sp=ShellShocker-_-14-130-563-_-10312010

http://www.newegg.ca/Product/Product.aspx?Item=N82E16814130562&cm_re=gtx_460-_-14-130-562-_-Product

ones on sale and the other is reg price, whats the diffirence?

The Shellshocker one's a Superclocked version, hence the higher core/shader/memory clocks. However, the cheaper card would most definitely be able to hit and even surpass those clocks with a little overclocking on your end.