Looking at the various pIqaD fonts, I believe it is a pity there are so many.
All these variations, would raise the question: Since someone, for obvious reasons, can't learn them all, then which one should he learn ?
Let alone the fact, that due to the way some of these characters are designed, if someone was to write them free-hand, several of these characters could be confused one for the other.
Anyway, I have learned (or is it learnt ?) the kli pIqaD, which appears when someone has selected the upper-case letters.
Although, now that I have learned (or learnt) it, I don't know where to use it.
~ nI'ghma