Don't ever apologise for asking questions
The Corral would be pretty quiet otherwise and I know I learn most simply from asking other collectors!
Peachy is one of those ponies produced so many times for so many countries for so many releases that the sheer number of batches produced not to mention how they are all "raised" or stored or played or displayed with over the years, means the changes are good that there will be a lot of variety in colour shades.
She is a cutie though and even though its just faded or colour leached hearts, there is no harm in having extra Peachies