Yes the extra draw makes a real difference.
Did a little vid comparing the 30# to the 45# limbs, with A 576 grain arrow.
Here's a link if the vid doesn't load here. Looks like my last vid posting is not loading up, at least for me.
https://www.youtube.com/watch?v=JcRD7jF5kB0This was the other vid just shooting various arrows with the 30# limbs,
https://www.youtube.com/watch?v=suGBCq5b1KQ