Compared to non-members they are in a much better position in regards to security for the obvious reasons I pointed out.
A non-member is less likely to have a supernatural Faith, avoid sin, and if in a state of sanctifying grace it is more difficult for them to stay that way without the helps of the Sacraments.
A non-member must be in a state of sanctifying grace (and have a supernatural Faith) in order to be saved within the Church according to the teaching of the Church.