Nope, Had you of said half life 2 and orange box, then yes you would get a copy of CSS free with it. But half life, and orange box themselfs dont come with CSS.
As for if its better? Ill have to say yes. I got my friend a copy of CSS and CS and he immediately fell in love with CSS, hasnt even touched CS.
But Ive heard some long time CS fans dont like CSS. And some long term CSS fans dont like CS.
Its really up to you. See if you cant steal a 3 day pass off of someone to try it out.