the more expensive one came with about 500 different nuts and bolts and washers to fit to the back of the telly in virtually every conciable depth, thread and head size, but you wil need to get your own wall fixings

here's a tip, figure out where you want to put the bracket, put some lines on the wall, then put a hole in the corner first before you start to level everything up make sure it's not on the piss

the priceier ones also have individual either side adjustabilitym, whereas the cheap ones just have a fixed braket

mine is also lockable so you can' pinch the telly off the wall