Sean -
from my experience at both crags, jibby pretty much covered it. World wall at 32 is steep, overhanging, and stout, and primarily .11hard - .13. Lots of link-ups/extensions and it seems to only get harder the higher you go. 38 has numerous walls and mini-crags and plenty to climb in the .8 - .10easy range and is thus a nice destination for introducing people to climbing outdoors. There are also some great 10s and 11s, so it's also ideal for when you have a mixed group of abilities.
In closing, 32 all the way you ninny!