I cant make a comparison, but I do have the classic Max with the basement pocket.
It is somewhat large, but I used it during my turkey hunt for the first time this past spring in the mountains of NM. For the first outing I really like it. Since then, I have worn it on my 4 wheeler while riding around and scouting for new areas, and a half day trip on horseback too. It has worked well in each application so far. Sorry I cant make any comparisons for ya, but I can tell you what will fit in the classic max and its a LOT....LOL
Here is what I run in mine and location of each item:
One side pocket contains a bottle of windchecker, small plastic case with diapram calls, and in a zip lock bag I have a carmex tube, 4 cotton balls, and a mini bic lighter.
Second side pocket contains my leatherman and my back up headlamp (primary goes in pack).
Main compartment holds 8x42 binos and my IPhone.
Small pocket in front of the main pocket will hold my leupold range finder or a GPS unit, depending on the situation.
Pocket behind the bino holds a pen, license/tags, 2 lens wipes, and a bit of TP!
The Max pocket contains my cheap emergency blanket, some paracord, 4 water tablets to purify water, a 1 gallon zip lock bag to contain the water, my primary compass, 2 Sure fires (firestarter), a whistle, fero rod/striker, and a granola bar!!
My concept was to have all the items I may need for one of those "OH CRAP" situations that I HOPE I never find myself in. I also wanted to set this thing up so I could grab and go with it as a minimalist set up.