this is all red herring that you are at a disadvantage b/c you don't have a 16t. The 90-110rpm band with the 16t gives you 23.94 - 29.26 mph. Guess what, if you go at 105rpm with the 17t, you are at 26.25mph. If you go at 95rpm with the 15t, you are at 26.98mph.
So unless if you are so sensitive to cadence that a 5rpm difference puts you at trouble, this is all irrelevant. And if you are indeed that sensitive, you ought to learn to develop power at a whole range of cadences.
The only time cadence really matters is when it falls outside of your power band and you become physiologically inefficient. Think grinding up a hill at 55rpm or spinning out at 135rpm.