It can be difficult to pick up all the differences between two pictures even if you have them side by side. It is even worse if you have to compare them by memory. (Image and answer is available on the http://bluebuddies.com website)
Finding and seeing the differences is just the start of the learning process. A more important question lingers, do the differences even matter? As an example, we all have different handwritings, we also speak with some slightly different accents. Some of us even write with grammatical errors. However, we can communicate reasonably well even with all those differences.
In martial arts, if we are too obsessive with the act of copying / imitating moves, we may lose the true intent. However, to not pay attention to important details, you may be spending years and yet never reaching your full potential.
Exercise
Our yearly show is right around the corner, aside from the 4 flows that we are demonstrating as a group, please make suggestions on topics to share with the audiences. It has to be visual and easy to proof or illustrate. We may pick 2-3 of the top suggestions to use in the show.