PPF vs VPF: Understand differences and know which one offers higher return on investment

PPF vs VPF:  When it comes to tax-saving options, people have a number of schemes to invest their money, reduce taxable income and ultimately save tax. Of all the existing options, only a few fall under the EEE (Exempt-Exempt-Exempt) scheme. These options save tax not only in the beginning but also in the other stages. Let us understand here, two popular tax-saving investments Public Provident Fund (PPF) and the Voluntary Provident Fund (VPF). What is the difference between them and which option is better?