Xanthan Gum vs. Guar Gum

I've finally put my money where my mouth is and have been using guar gum instead of xanthan gum in my baked goods for the past few weeks. Xanthan gum is corn-derived where guar gum is not. I can see no difference between the two in my baked goods. I've been using 50% more guar gum as xanthan gum, so if a recipe calls for 1 tsp. xanthan gum, I use 1 1/2 tsp. guar gum and everything has been