Modular dungeon pros and cons

Has anyone done up a pros and cons of the various modular dungeon deisgns? Bruce's 3x3 vs Dwarven Forge's 2x2... flat pieces + removable walls vs built on walls... con center walls, vs con edge walls?

Source: http://hirstarts.yuku.com/topic/5416/Modular-dungeon-pros-and-cons

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