Quick answer
It is the same trade-off as for any copper vs aluminium conductor. Copper multicore (APAR Shakti / Mahashakti) is more conductive and compact — ideal for most appliance, motor and control wiring. Aluminium multicore (APAR AlumShakti) is lighter and more economical, a smart alternative for cost-sensitive power distribution and larger runs.
Aluminium needs a larger size for the same current, so size to the metal you choose. Browse all multicore cables or contact APAR.