Studies 11/3

I did a set of 3 minute studies while watching the Crimson Dagger stream. Trying to master form, and my tablet. After words, to practice value, I went in without reference, and drew up some value for each individual piece. I was messing around with different painting styles including brush shape, size, opacity, and flow. Can you tell which is which? It seems like there's really not too much difference.

All photos referenced are from lovecastle.org/draw/ a handy device for timed references. I feel that with these timed references, I will have to learn to do forms correctly in a shorter amount of time. Therefore forcing me to master it at a faster pace (or it could just wear me out) But even today, I can see some improvement.