I haven't tried either one...only Copaxone but I do follow the latest on Tysabri and it's not pretty.
Tysabri? There is no way I would EVER try this particular MS drug.
It was taken off the market due to several deaths...finally became available and now there have been a few more.
No thank you, I would pass on this game of Russian Roulette.
If these are your only two choices, I would do Rebif or nothing or Copaxone...
Seems like your doctor is looking for a test subject.