Hello,
Both are very different engineering courses. The choice depends on an individual's interest.

The main job of aeronautical engineer is to devise aircraft and propulsion systems, but with time, the engineer is given many more responsibilities to carry out. The average salary of an aeronautical engineer is INR 6 lakhs or more.For it you need to go for Btech aeronautical engineering course.
Please visit this link https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/colleges/list-of-aeronautical-engineering-colleges-in-india&ved=2ahUKEwj2xdfvgtfpAhUCyDgGHcSJBxQQFjAAegQIChAB&usg=AOvVaw1GQ4bGg9mW1MfF4iW9ozzt

The main job of software engineer is development and building of computer systems software and applications software.The average salary of an software engineer is INR 4-5 lakhs or more. For it you need to go for B.tech in CSE or IT. Please visit this link https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/colleges/list-of-information-technology-colleges-in-india&ved=2ahUKEwi37vT1gtfpAhU8xDgGHXznBtEQFjANegQICRAB&usg=AOvVaw3buNaa9p__qKQUGFyE40XN

Hope it helps