No need to be confused. There is a long thread about old and new types of xpg2s42b (and other G2) emitters here: Cree changed production process for XP-G2 emitters!
This picture maybe best shows difference between old and new one:
No need to be confused. There is a long thread about old and new types of xpg2s42b (and other G2) emitters here: Cree changed production process for XP-G2 emitters!
This picture maybe best shows difference between old and new one: