What is the difference between swarovski crystal AB and Swarovski crystal transmission?

Question

and which one do you think is more quality?

Answer 1

http://www.wisegeek.com/what-is-a-swarov...

I think the crystals are the same, they're different only in the coatings, and coatings are basically metal oxides, that's why a ruby and a sapphire have the same composition (Al2O3),  but the first is red and the other blue because the blue one has traces of iron, titanium and chromium. If you want to impress people with the price, go for the more expensive one. If you want to impress them with your good taste, choose the pretiest. Chemically, they're both coatings made from metal oxides, there's no extra quality there. The shinier the best (more lead, better glass).

Answer 2

They have different names??