Risk it?

Colleges & Universities Harvard University
2

Things to consider:

  1. Harder to get into Harvard from deferred pool than from REA pool. RD is going to get some strong applicants who got rejected/deferred from other top schools.
  2. Tufts is a very fine University and provides you with all the resources that you need to reach your goals.
  3. Since your concern is what happens if you get admitted to both, I will withdraw from Harvard before or immediately after you apply to Tufts ED.