As a retirement savings plan, you contribute to it from your salary, and your contributions are free from tax. The result is savings for you. The money multiplies earning interest and remains tax-free until you withdraw at the time of retirement.
The primary purposes are to encourage a person to save for retirement as a pension from the government might not lead to secure living. GIC stands for Guaranteed Income Certificates, or GIC is saving instruments issued by banks and trust companies.
They hold certain interests, which is often higher than the typical savings account. RSP is a retirement plan, while GIC is a term- based certificate. RSP can be opened at any time, and the contribution to RSP and the interest earned are tax-deferred. If your ambition is to earn tax benefits, go with RSP.