The break weight is indeed the same, pre-set trigger or not. Pre-set is just shorter.
Whether heavier trigger is safer or a particular trigger configuration is better than the other is mostly subjective; different people have different takes. Safety is in broader sense, not only related to unintentionally discharge. Generally speaking if one has more confidence in an equipment so that he doesn't worry when using it, it is safer for him to operate it.
I hope this doesn't come out to be too ignorant.
-TL
Whether heavier trigger is safer or a particular trigger configuration is better than the other is mostly subjective; different people have different takes. Safety is in broader sense, not only related to unintentionally discharge. Generally speaking if one has more confidence in an equipment so that he doesn't worry when using it, it is safer for him to operate it.
I hope this doesn't come out to be too ignorant.
-TL