What is the difference between 70 gsm and 75 gsm in paper quality?

75 gsm and 70 gsm are the weight of the paper naturally the 75 gsm is a little bit good tha 70 gsm paper it is costly to but the 70 gsm paper is good for daily printing on laser printer but if u want to make special assignement or project or may be resume than go for the 75 gsm or more