Dear Narsi

Aac blocks are better, read below some of its benifits.

AAC’s improved thermal efficiency reduces the heating and cooling load in buildings.               
AAC’s workability allows accurate cutting, which minimizes the generation of solid waste during use.               
AAC’s resource efficiency gives it lower environmental impact in all phases of its life cycle, from processing of raw materials to the disposal of AAC waste.               
AAC’s light weight also saves cost & energy in transportation.               
AAC's light weight saves labour