There are no extras with Pro. The difference is simple. You connect with 5 ultrapeers instead of 3, which helps searching for rarer material. And the maximum no. of hosts you can download per file is 10 compared to Basic's 8. Pro is often considered more-so as a donation toward the future development of LW.

1. Beware of Fake files in search results

2. How to find music

3. Direct instructions to eliminate porn from results which has a link to other items you can filter out.