I'm out of my depth in this august group, but forging ahead fearlessly anyways... It seems to me one vs. the other could express musicality. For instance, I could see toe first working well with slower, smoother music. I could see heel first (and then shortly after the toe coming down) working will with faster music that has extra notes to play with. Chrisa, it would be fun to see a demo video to showing the difference with two different Tango songs.