I can't see Stark has anything Wayne can't have. He's just Bruce Wayne, but without the training.
Stark is somewhat more than that. Bruce Wayne is bright, but Tony Stark is one of the top minds on the planet - second to Reed Richards, but perhaps nobody else.
To quote wikipedia:
"Tony Stark is an inventive genius whose expertise in the fields of mathematics, physics, chemistry, and computer science rivals that of Reed Richards, Hank Pym, and Bruce Banner, and his expertise in electrical engineering and mechanical engineering surpasses even theirs. He is regarded as one of the most intelligent characters in the Marvel Universe.
...
His expertise extends to his ingenuity in dealing with difficult situations, such as difficult foes and deathtraps, in which he is capable of using available tools, including his suit, in unorthodox but effective ways. He is well respected in the business world, able to command people's attention when he speaks on economic matters, having over the years built up several multi-million dollar companies from virtually nothing. "
So, yes, Wayne has Stark on the combat training front. But Wayne can't rig up a gizmo to open a portal to another dimension, while Stark probably can.