I'm considering purchasing one of these two bows for target shooting and occasional hunting. My local store has the Saber and Orion for virtually the same price (Saber is more expensive by about 5 dollars). What is the difference between these two bows? Which is better than the other and for what type of activity?

I noticed that the Saber has a magnesium riser and the Orion a machined aluminum. Aren't magnesium risers cheaper/older? Are there any disadvantages? If magnesium is cheaper, what about the Saber makes it a little more expensive than the Orion?