hi ,
the blue box is for the non-smoke and sound ,they still make them,sells 8$ cheaper at the factory.
it is programable, runs a little faster, comes with plastic gears from the factory , the 4 trims on the controller are fake.
the electronic circuit board does not fry,reliable,comes with black cap motors .

the white box is for the full option model (smoke + sound ) ,they also comes with plastic gears ,if you got metal gears it is the seller that puts them in not the factory).
run better at low speed,amusing mg action,i like the recoil action,cheapy sound,the turret engine turn better(what i have notice on my tanks).
*the circuit board fries (burns) if you go play rough outside(mud or torque situations)drains to much power.
2 of the 4 trim button works (2 are fakes)comes with white cap motors.

henglong factory prices went up 5 $ in 2007 for all models
the box does not come plastic sealed , only taped at openning.