The two of you can combine minds and solve problems more effectively than most. Misunderstandings happen occasionally but not usually enough to limit the effectiveness of problem solving. You may find that the two of you have no common frame of reference for the comparison of ideas. There is little disagreement or argument but also very often, little interest as well. This configuration makes it easier for these two people to express their feelings to eachother.
Romantic interest is common.
The Mercury person is usually infatuated with the Venus person. In friendships, this is an indication that they have a variety of interests in common. Communication between these two people is courteous, easy-going, light hearted and usually informal. This is essentially the same as the conjunction, so you should read the description above. There is less liklihood that the Mercury person would become infatuated with the Venus individual, however.