Right now, PTS is trading on Bter at 0.00514, while BTSX is at 0.0000447. One PTS entitles you to about 100 to 105 BTS after Nov 5, but these BTS will not be immediately liquid. What this means: If you sell your PTS now and buy BTSX, you'll get about 15% more BTS after the snapshot than you would if you held PTS; in addition, these BTS will be immediately liquid so you won't have to wait through the 2 year vesting period.
I've already converted all my PTS to BTSX, but I thought I'd point this out to people who haven't yet - I want to sell PTS for BTSX right now so bad that I hope someone gets to do it.