That's pretty damn good Unit, I really like how you apply the reflection and the overall colour distribution. There are a lot of improvements regarding the use of tones and colours, it really shows some experience acquired in that area.
Then there is also the ponies themselves which look pretty damn good, I like how they maintain part of your style without getting abruptly affected by it, is really well composed and really well integrated into the image. There are also a lot of things that makes it look good like an appropriate use of lighting and shadows, correct outlining and the attention to detail given to the whole composition, is really good.