Nusa Lembongan or Gili Islands

Im in a dilemma about my vacation this year. I have two options: Nusa Lembongan or Gili Islands. Ive only seen photos of beaches and I liked both of these resorts but I dont know how to decide. Can you tell me what kind of activities can I expect on both of these islands, and Ill try to decide based on what they offer? Thanks.

To put it in a nutshell, Gili Islands are a tropical paradise and undoubtedly have the best beaches on Bali, but theyre mainly a backpacker destination and nothing exclusive and spectacular can be found there. Atmosphere is pretty relaxed and off-beat, and there are no motor vehicles on the island. But, fortunately cell phones do work as well as the internet. The place is famous for diving and snorkeling. On the other hand, Nusa Lembongan is a very exclusive resort. Its somewhat secluded and you get there by a private luxurious sailboat. Rooms have various commodities and in general this is the resort for wealthy people, while Gili Islands are more for younger population with less money.