We all know that NASA is the space agency of United States of America, one of the richest and developed countries in the world. ISRO is the space agency of the India which is a developing country, so the difference in budget and costly technologies will reflect in the performance of both agencies.Even from such thing, ISRO is capable to compete with top spending space agencies like NASA and ESA. So the scale here used for compare ISRO vs NASA will consider these facts also.