There is no substitute for Jet time, regardless of type.
While the Embraer is comparatively rare that is irrelevant, it is a modern, transport category Aircraft and, once again, it is a JET.
So there are more ATR's in the world, so what ?
The 195 will be a far nicer type to fly and the experience gained will make you significantly more marketable to a future employer with larger Jet's.
Go for the Jet