Because the job will be interpreted twice, there is a slight chance of content differences (though in StudioRIP they will be interpreted by the same PS engine under the same conditions, so this chance is little more than theoretical).

Advantages:
· color accuracy: the typical color accuracy is about ∆E = 1.
· accurate non-CYMK colors: the accuracy of the non-CMYK colors is incomparably better.
· one profile needed: the profiling work needs to be done just once, and then various ICC files can be simulated by one mouse click.

Disadvantages:
· data integrity: there is a slight chance for content differences between the proof and the print.
· lower speed: the file needs to be processed twice.
· imposition: only automatic impositions, that can be replicated in the proofing process, can be simulated.