Three friends, Jenna, Michael & Alice are debating whether an RRSP or a TFSA would be a better choice for them. Each of them is the same age and is saving for a goal that is 15 years into the future. Jenna has an income of $100,000, Michael has an income of $70,000 and Alice's income is $40,000. After the target date, Jenna expects to have an income of $70,000, Michael expects to be earning about the same and Alice expects to be earning $70,000.

Assuming they use the tax refund generated from RRSP contributions to re-invest into their RRSP, which vehicle would be the best choice for each of Jenna, Michael and Alice? Assume they live in Ontario and will earn the same return in both vehicles. Identify any assumptions made. Your conclusions should focus on the reason(s) for selecting a RRSP or TFSA, including tax implications of a changing income level, and not just focused on calculations.