What is the difference between Form 15G and the Form 15H?

What is the difference between Form 15G and the Form 15H?

Declaration in the Form 15G/H can be made by an individual or a person (not being a company or firm). Hence, a company or firm cannot submit a declaration in the Form 15G or in the Form 15H.
Form 15G is meant for resident individuals who are below 60 years of age while Form 15H is meant for senior citizen i.e. individuals who are of 60 years of age or more during the financial year.
Eligibility for Form 15G: The total income during the financial year should not exceed the basic exemption limit as per income tax i.e. ₹ 2,50,000/. If the total income during the financial year exceeds or is likely to exceed ₹ 2,50,000/- then the individual cannot submit Form 15G.
Eligibility for Form 15H: If the individual is 60 years but less than 80 years of age, then the total income during the financial year should not exceed the basic exemption limit as per income tax i.e. ₹ 2,50,000/-