OK, I have the final answer. August was much harder.
But, if you asked my real opinion I don't think that there was much of a difference overall when you consider all of the forms.
I know how the first poster feels. I went into the April MCAT feeling moderately confident (and promptly got a 23S) so I purchased more materials (Examcrakers + Audio Osmosis). For me, the Audio Osmosis was a big help. I finally felt that I could remember the basic stuff that I studied more than 10 years ago. In short, I felt pretty confident.
Of course, reality rained down on me like a stack of O-chem books in the guise of form AG.
Apparently, in retrospect, what I needed was a PhD in Molecular Biology, Optical Physics and Physical Chemistry.