There is one coin that is the most profitable coin to mine in the crypto scene right now, created and managed by wolong.  Whatever your opinion of him is, he is a proven rainmaker with a stake on the success of his coin.  Then there are the copycat coins whose entire purpose to exist is to confuse people who are trying to buy/mine PANDA because they have issues with the PANDA IPO, and are basically wasting everyone's time and money.  You choose.

The real PANDA is Scrypt Adaptive-N based.  https://bitcointalk.org/index.php?topic=460037.0