Madonna may have dressed a little provocative in her day but she didn't need crazy outfits and gimmicks to get recognized like lady gaga has. Also while gaga has a following, Madonna has had more longevity, music, movies and print work.
I love Gaga, she truly cares for her fans, and about helping people accept themselves for who they are. That is meaningful. On the other hand, Madonna was always very self-centered, arrogant, and not a very nice person. I think Madonna has humbled up a bit.