Both Sentenced to Death and Life imprisonment connotes different meaning and purpose as per Indian Penal Code lets me try to explain each of them.
Life imprisonment is any sentence of imprisonment for a serious crime under which the convicted person is to remain in prison for the rest of his life. Crimes for which a person could receive this sentence include murder, attempted murder, severe child abuse, rape, espionage, drug dealing, vandalism, human trafficking, severe cases of fraud, robbery.
Note: Below is stats around the world about life imprisonment.
Note:Life sentence in India has a duration of minimum 25 years till death. The only authorities that can pardon a sentence in India is The President or The Government after review which is decided on a case-by-case basis.
Sentenced to Death
Sentenced to death or death penalty is Capital punishment whereby a person is put to death by the Court as a punishment for a crime.
Crimes that can result in a death penalty are known as capital crimes or capital offenses. Following are the crimes under Indian Penal Code, 1860 which warrants capital punishment.
Note: Official government records claim that only 52 people had been executed since independence under various provisions of IPC til date.
More Information on this:
1. Life imprisonment
2. Indian Penal Code
3. life imprisonment means life :Lakkhi And Etc. vs State Of Rajasthan And Anr. on 14 August, 1995