SP21G is a semi-chisel .325″ mini 1.1 mm chain especially developed to increase the cutting speed and efficiency for full-time use battery chainsaws. The chain is energy efficient and the optimized geometry delivers a consistently smooth cut, excellent bore cut as well as improved handling and manoeuvrability.
Will it cut as thin as 1/4 .043? No… close but not as thin a kerf.
Will it cut as fast as 1/4 .043? Hmm.. no enough testing done yet.
Will it be a stronger set up than 1/4 .043? Yes – slightly thicker bar and sturdier chain.
Will it last longer and be easier to sharpen than 1/4 .043? Prob yes on both counts.