O.K. - self-imposed hiatus aside for a moment. "Better corner performance". I'd highly recommend subscribing to Sean's site for the full review. (Vermonters always support other Vermonters commerce.) If I remember correctly, as with any lens review, Sean did make a point that multiple examples of the lenses are needed to really judge if there's a performance improvement with the"P" version.
Ya know - I really wish I had of gotten the freebie finder and the lens hood on the "P" version is nasty. If I was going to see an M8 in the near future I would have thought twice as the Milich adapters won't obviously function with an M-mount but the "P" is working for me just like I'm hearing the LTM is for others so "WTF", if the images we're getting are what we're looking for then that's all that really matters. (I think.)
. . . David, (Burkey)