Originally Posted by
lascabezas
So the question is: what´s most important for safety?, fit or Mips features?
Those aren't mutually exclusive. You need both.
FWIW, if you liked your Synthe, why not get a Synthe MIPS? For that matter, if one Giro fits your head well, you should be able to wear any helmet in the Giro line with a similar fit. Other brands may or may not fit - you have to try them to see.