With a suspension lift you fit longer springs and lower your axles in order to fit larger tyres.
Lowering axles always gives your vehicle other dynamics.
More roll in corners, less stability side hilling, stiffer springs for more load capacity, often a need to correct the caster.
A body lift fits spacers between chassis and body in order to fit larger tyres.
But this doesn't change the vehicle dynamics as much. You are keeping your original plush ride springs, your original shocks, your original articulation and the original wheel alignment.
If you want to add heavy items like bullbars, winches, racks, drawer systems ie expedition style, than stiffer springs are needed to counter the weight.
If you want to travel into the desert or into the arctic a body lift and trim is needed to accomodate the very large tyres.
If you want to crawl rocks then you want longer springs with a low springrate, longer shocks and a smaller drive ratio to accomodate those grippy tyres and slow driving.
If your a cruiseraddict you finally come to the conclusion that you can't simply leave that vehicle alone and need to try everything in the long run.