Though they are both millionaires whose only superpower is Money, I think that there are HUGE differences between those two, though I can be wrong, because I'm a Batman fan but I know very little about Tony Stark. I grew up with DC series and the only thing I knew of Marvel was the 1994 Spiderman cartoon, and the X-Men movies.
From the profiles though, huge difference would be childhoods. Tony Stark was a boy genius, his parents might be too busy for him or vice versa, but he didn't lose them until he was an adult, to a car accident. Bruce Wayne lost his parents when he was a little child, he was actually there too, when his parents were gunned down in front of him, after they went to a movie.
Tony Stark had girlfriends (http://www.republiquelibre.org/cousture/bd/IRNMN5B.HTM) before he was Iron Man. Bruce Wayne on the other hand, he grew up as Batman, because I doubt he even noticed girls at the time his parents were killed in front of him and totally stunted his development. Considering that Gotham is probably a smaller city, and that Bruce lives way out there in the gloomy castle, I doubt he met a lot of girls until he was a full grown man hosting parties...and in fact, watching Burton's Batman (1989), I can believe it if the photojournalist was the first person that Bruce has ever had sex with.
Bruce Wayne's libedo is probably greatly exagerated
From the profiles though, huge difference would be childhoods. Tony Stark was a boy genius, his parents might be too busy for him or vice versa, but he didn't lose them until he was an adult, to a car accident. Bruce Wayne lost his parents when he was a little child, he was actually there too, when his parents were gunned down in front of him, after they went to a movie.
Tony Stark had girlfriends (http://www.republiquelibre.org/cousture/bd/IRNMN5B.HTM) before he was Iron Man. Bruce Wayne on the other hand, he grew up as Batman, because I doubt he even noticed girls at the time his parents were killed in front of him and totally stunted his development. Considering that Gotham is probably a smaller city, and that Bruce lives way out there in the gloomy castle, I doubt he met a lot of girls until he was a full grown man hosting parties...and in fact, watching Burton's Batman (1989), I can believe it if the photojournalist was the first person that Bruce has ever had sex with.