Have they fought, and who should win?
If the Vision is intangible will Stark be able to use technopathy? Im not too sure but making the parallel with someone like Kitty Pryde; when she is intangible isnt she immune to telepathy and/telepathic detection? So if Iron Man cant hit or control the Vision then he loses. The Visions powers of disruption are amazing [He has done it to people like the Juggernaut and Hyperion to great effect] and i dont see Iron Man's armour or his flesh holding out against it at all.