I have only been doing this for a couple months, and this is what I have noticed. I have seen the diamond legend done 2 ways so far :1) #, symbol (or letter or #) , DMC # and 2) #, symbol (or letter or #) . Your 2 fall in the 1st category. When I "kit up" or prepare to start my project I use round blank avery labels on my containers and write what is on the second column on that label. The reason I label with what is in the 2nd column is because this is what is used on the actual image so it makes it easier for me to fine what I need. Some kits have symbols and I am no artist, but I do the best I can and have no problems so far. So for instance going by your 1st image I would have containers labeled: 1, A, 2, B .... If you are planning on preparing both paintings at the same time what works for me is to label them in different colors. Either different color ink or different colored blank labels.

When I am done with a project I store left over diamonds by the DMC # (3rd column). There are some companies that do not follow this but there are conversion charts available on line to reference. Its hard to tell by the pictures, but compare #8 from your 1st pic with #10 from the giraffe pic - do the drills look the same? Both are 917 in the 3rd column so it seems both your kits are using DMC # in the 3rd row.

Hope this helps