I'll be glad to lend a hand!
1. The Oasis has page-turn buttons
2. The Oasis is exceedingly light and comfortable (outside its cover, naturally)
3. By all accounts, the Oasis has somewhat better contrast than the PW3
4. The Oasis is so expensive that reading on it in public gives an impression of a really wealthy and important person. Even if you have to empty your savings account to buy it, it'll be worth it. Image is everything.