Asus 900 vs 901?

I’ve been curious about the difference between the Asus 900 and 901 models. Some say battery life is far better on the 901 because of more efficient chips, hence the higher price, but I’ve been wondering if anyone has any real-life experience with one that they can share? Is there a huge difference, and is the price hike worth it? I’m interested in one for travel purposes – basically send/receive email, read the news and back up my whatever photos I take. Thanks!