After 2 months of thumb plucking I'm getting ready to move on to some fingerstyle material. Unfortunately, James Hill teaches P-I-M-A while Aaron Keim teaches P-I-M. I guess that to an experienced player there isn't much difference but it's a little confusing to a new comer. Is there any reason to pick one over the other or should I just learn both. I guess ultimately the particular arrangement will determine which one uses. What do you think?