I'm happier with the Brian Epstein than I am the Macca's. The earlier Macca (Not the Savoy one) could be authentic but rushed but it doesn't have enough good qualities for me to buy it, there are enough out there without any question marks authenticity wise. The 'Savoy' Macca is another could be IMO but I'm not great with later Paul's so wouldn't buy it just on my own judgement.
The Epstein and older Macca look authentic to me. Regarding the newer Macca, the "AU" looks off to me and I don't like the connection from the "L" to the "M."
Ballroom, you have a good point. the Pa is definitely not typical, and the slant is unusual. the transition from the L to the M doesnt really bother me too much. when I first looked at it quickly, I thought is resembled the Mac's that I have seen in some of his book signings. but upon closer look, now it does look funny.