This is going to be copied and pasted over from the other explination but splitting this up into two notes which would be ideal for this for a few reasons.
The original card had a bit too much information on it for all one go. The point was brought up that this may not be "high yeild" which is why it should be kept to a minimal but I beleive that gives it all the more reason to split it into two. The ability to distinguish between these two pathologies is best done when you have to see one at a time standing alone rathern both side by side with a single pathology above and below (what your eyes are seeing with your previous card) and it enourages a bit more visual memorization of the card versus differentiation.
Mallet finger and trigger finger only have this one card (compared to the millions of cards about thryoid and such) so I think it is in the best interest if we do a proper job with this rather than rushed.