SLDL or Romanian Dead lifts are the two best overall mass builders for the hamstrings. but to answer your question it is up to you. to stimulate hypertrophy and strength for the hamstring studies show the eccentric portion of the movement is the key. you want to raise the weight with a quick controlled movement pause and hold in the contracted position for a 2 count and lower the weight in a 4-6 count.
use which ever machine you can do this the best with.