What differentiates OJM's vault design and yours, not counting prematurity of defensive levels, is that his base has compartments that protect the inner vault, while yours has very few that do so.
If you look at OJM's, it's misleading. It takes many wallbreakers to reach the core, and wallbreakers will probably not even get there, because of the large amount of compartments surrounding the inner core. Assuming he has level 5 walls, which are the same as yours, it would take a MINIMUM 4 wbs to reach the core, assuming they do exactly as I want them to do (his spring traps often prevent the wallbreakers to actually reach the wall they are trying to blow up. In your base, it takes half of that number of wallbreakers to reach the center, and it would be much easier to control them to do what I want (assuming I take out the archer towers on the side with archers). Additionally, wizard towers are among the core defenses that should protect storage raids, but yours barely protect storage raids. Even if I did reach the core of OJM's, it would still be difficult to take all of the resources because of his wizard towers protecting his core. Yours has no strong close range defenses in the center, so once someone reaches your core, it's probably over.
http://gyazo.com/c7894363bb047ec8c53d201f81f3b748.png
http://gyazo.com/34ea72c03560963059809dd9ff9bfba3.png