Both ways work, one gives you a little more flexibility than the other depending on how you want to work.

The hardest part of trying to teach “art” is that there are too many different variables that come into play along the way for there to be one distinct answer or process to achieve any one goal. If you only give one way to do it you run the risk of being called out in instances where another process would have been a better choice. On the other hand, if you explain too much about different ways to do things you end up confusing more people than you actually help.

I would personally cater to the people who don’t need to have everything laid out in a direct, step-by-step, to the exact number approach in order to accomplish something. That’s pretty much no different than “teaching” a drawing class by drawing the picture yourself and then passing out photocopies and tracing paper so everyone else can “learn” how to draw by tracing directly over the image you’ve already created.

Focus on the why it is done, not the how it is done, and the people who truly want to learn will learn and apply it to their own style.

Or maybe just circle the changes in the before and after. I see them though: the crate and stuff under the fruit stand is darker and the farthest right grapes are lighter.