Package



For this part  "TPA6132A2RTET",  I foud that this package is WQFN on TI website, but it had already been modified ,because this package was "QFN" before. So, I would like to know what the correct package is ?   How to differentiate between "WQFN" and "QFN" ??

Besides, Could you please explain the difference for  "WQFN" and "QFN" ?