You have similarities in that you can both tend to be reserved and hard to get to know, but also very loyal once the ice is broken. However you have your differences in your mode of operating. Capricorn tends to be extremely practical and ambitious, very concerned with the mundane world. Whereas Aquarius is more concerned with social ideals and causes and deals more in the world of intangible ideas. Aquarius may enjoy discussion, whilst Capricorn may not see the value in talk. Capricorn may seem boring at times to Aquarius, who thrives on the stimulation of thinking and communicating. Aquarius may seem too 'head in the clouds' for Capricorn and may demand more practical results from them.