The 36-L is Mini-M dimensions? If so I might have to seriously consider it.
According to the dimensions on both GLA and ADG sites, they are the same.
Mini M: 14Lx8Wx10H (5.5 gallons) ~$105 shipped
36-L: 15Lx9wx11H (6 gallons) ~$65 shipped
The 36-L seems like a much better deal. Not only does it hold more water, but it is also almost half the price of the Mini M. Both are clear glass, though. I guess the major decision point here would be the brand name.