Partial reps do not seem to have any advantage over full reps to stimulate muscle growth. Full reps stimulate muscle activity over the entire muscle’s length. They also stretch the muscle under high tension. Exercise selection and accommodating the resistance curve to your strength curve are generally superior methods of adding variety to bodybuilding training than partial reps.
Including partial reps can be beneficial in advanced trainees to strengthen parts of a movement as per the specificity principle. Geared powerlifters in particular can benefit from strengthening their lock-out due to the lack of passive assistance they get from knee wraps, squat & deadlift suits and bench shirts at the end of these exercises.
Novices are better off building a good strength base by sticking to full ROM training, because they are not developed enough to require ROM-specific training.
Partial reps for many exercises allow for greater power production, which can benefit power development. Just as for strength training, these benefits are greater for more advanced trainees.h/