Hello. I have both the JarDesign A330 and the 777 extended pack, and if I had to choose between them, I would take the A330. Have in mind that none of the aircraft are study level ones, however the A330 is a little bit ahead from the 777. The main reason that I would choose the A330 is that I like Airbus more than Boeing, and you should buy the one you like more, due to the fact the are almost equally good. Both are on sale for less then 50 dollars in the Org.Store. Also, you should really think about the BSS sound packs, both the A330 RR pack and the 777 GE are equally good, however the 777 c