Both rallies where well attended, would guess several hundred to a thousand more at the Climate Action Rally, (But really the attendance was very similar and a debate on numbers would be a distraction from the real issue).
More corporate media at the Anti Climate Science rally. Lots of independent media at the Climate Action Rally (where does it all go?).
Much older, whiter, male and over weight crowd at the anti science rally, would assume that most of the crowd had traveled some distance and made an effort to get there. Colorful and diverse crowd at the Climate Action Rally, lots of families, students and music.
Didn't hear much of the Climate Action Rally as i left for the Anti Science rally not long after getting there. The Anti Science rally was pretty shallow the first speaker i heard said Australia and New Zealand is only X% of the population, the following speaker (from http://www.ldp.org.au/) said we produce Y% of the worlds CO2 (the astute listener would notice that Y was several times more then X). Stupid claims along the lines of "scientists said that Sydney would run our of water by 2009 but now its raining" and "the Murry darling is full" there for the science is all wrong. Really dumb stuff that 8th grade science could demolish, pretty hard to not think they are not deliberately deluding themselves.
Photos are public domain. Credit indymedia.org.au.