I think I extracted more detail from the data. This is a 6 map stack. I increased the resample so that the smaller storms are more visible. I played around with the colour a bit more too. The previous version was a bit too yellow, this version is more balanced but not perfect due to the seeing.
If you scroll down the page you will see a high resolution version of Ganymede. I checked the JP simulator and the detail is real. This is a month after opposition so the size is near peak and hence the reason the detail on Ganymede is so pronounced.
Click here for image.
Feel free to comment.