I realise that personal choice, doctor influence, ease of use etc account for a lot but I can't seem to find ENOUGH reasons to start on Betaferon, rather than Copaxone for example.
I have to start somthing ( i can't not try).
I know that nothing is set in stone.
I know that I can switch if it doesn't suit me.

But statistically, fewer people use Betaferon.

Why is this?
I'm scared of missing something and choosing wrong.