Both of you will feel problems in communicating with each other. There is always uneasiness between both of them. If the relationship is a love relationship, you will feel an irresistible sexual attraction towards the individual.
There may be times when these people will seems unnecessarily secretive in your relationship. They will be interested in you money or other things instead of you to be attracted.
But if other planets between the two horoscopes especially the moon (moon denotes your inner feelings) and the ascendants are having good relations is an intense than Devotion, loyalty and respect will be there between both of you. If ascendants and moon of two horoscopes are in unfavorable axis than your relationships will be tense and difficult indeed.
So just checking your Compatibilities by only sun sign pattern is not full-proof system of match making. So it is better to get your horoscope matched by a qualified astrologer.