JBaent, I would not give too much on posters - the same posters that said "plays all the Dire Straits world famous hits Money For Nothing, Walk of Life and bla bla bla." Secondly, Mark is much better looking than this Russell guy and therefore earns some more stage time for sure! :-)
Mark is a much bigger act, I would never assume that he is asked to do some kind of "opening act". Of course Bob is top act, but nevertheless Mark is bigger in Europe for sure, so I am sure it will be one hour playtime at least!
LE