I know to play, I mean, i am be able to do several tricks of "contact", and, I think, not precisly that be limited, better said, is not so spectacular as spin top is.
Is a diferent game, and for thatreason, you can not say which one is better or worst. Of course, I prefer a lot to play trompo than contact.
And i believe that is even much more easy to learn and to become a very good "contact" player in shorter period of time, than to get the same results about spinning top. At least, this is what I feel by being experienced both toys.
I stress, that to me, is not comparated the amazed that the people stays when see you playing with a top, than with a contact ball.