I actually could totally see the resemblance between Pinkie and Maud. If you look at her personality and mannerisms, she's almost exactly like Pinkie without the sugar rush. I also found it ironic how AJ and Maud were said to be "practically identical". The element of Honesty doesn't even see the truth that shows when you substitute the word "Apple" for "Rock".
Rock jack would know hundreds of different types of rocks, name her rocks instead of apple trees, create tasty treats out of rocks instead of apples, be able to kick large boulders and have lots of ripe, round pebbles to... Oh wait, that's exactly what Maud does...my point