Difference Between DustOff & CAIG DustALL

What is the differences between the Difluoroethane R152 in the DustOff & the Tetrafluoroethane (134a) in CAIG's DustALL?
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The R152 (152a) in the DustOff is flammable and the 134a in the CAIG DustALL is non-flammable. Using a flammable product around any electronic equipment is unadvisable, since static electricity could create arcing, which could in turn, damage the equipment.

Also, the 134a costs more, so there is a higher retail price.