To add to the above, すごい does not have to be a compliment or something "good" (positive connotation). Think about the word "incredible". You can say someone's breath is すごい, which implies that it is bad. "Something is beyond of expectation" is a good translation, but it does not always mean it is cool, while かっこいい is always cool

(my English is poor-_-||) i think so,the second also meass horrible

●かっこいい Someone's appearance or behavior is cool. "He is cool/HANDSOME; appearance　彼はかっこいい" "He is kind to everyone so he is cool; behavior. 誰にでもやさしい彼はかっこいい。" Just saying かっこいいwithout any reason as in the first example would imply that someone's appearance is cool/handsome. ●すごい Something is beyond of expectation and is therefore cool. "No one can run faster than him so he is cool/AWESOME. 彼よりも速く走ることができる人はいないので、彼はすごい。" Hope this helps!