LWB is about 300mm longer in wheelbase and 600mm longer overall than a SWB.
LWB is a definite advantage for climbing, it also rides a lot smoother.
More storage area is a bonus.
Not many people stretch SWB's to LWB or longer as it is quite an ordeal to get approved and registered.
I built a SWB and then bought a LWB body shell and bare chassis to fit all my bits onto.
Check my build thread in the rigs section.
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