keywordkeyword.com or keyword-keyword.com?

which is better with se?

[illusionist]

Shouldd i go with keywordkeyword.com or keyword-keyword.com? Would search engines see keywordkeyword.com as keyword+keyword? or should i go with keyword-keyword.com?

[skipfactor]

keyword-keyword.com is better for search engines.
keywordkeyword.com is better for people.