Obviously the Boondocker box is better,for some mods you can get away with a fuel pump regulator and inline fuel reducer,but the BD Box is still better...if you plan on doing any mods later(twin pipes,big bore,NOS,ETC...) the Box is the only way to go! JMO
The boondocker for a stock bore, stock cylinder, twin pipe sled is over kill IMHO. Unless of course you plan on adding some of these other items down the line. The BD box is BY FAR superior, but like I said unless you have some serious mods (or plan on it), it is overkill.