OOooo I like this piece, overall its very nice there isn't too much I would change. Only about two minor things
First is the color of the blanket in the original image has more of a lavender tint to it compared to yours which is more pink tinted, which wouldn't be an issue if the Miku pony herself wasn't also a very similar shade of pink
the only thing right now that is differentiating what is her legs and what is the blanket is the outline, whereas if you just adjust the hue slightly more towards a slightly cooler shade of pink it is still pink enough to keep the color palette fairly analogous while also using more than just the outline to separate the colors
I'd also make the background ever so slightly darker and cooler toned but I didn't make an edit of that
but then there's the second main thing I would change is that right/back ear. it looks a little awkwardly placed on the head and when you try to examine the shape of her skull it becomes a little more awkward
adjusting it to be more... idk symmetrical? with her other ear I think looks more natural while also not looking too out of place with your style.
other than that very nice piece I really enjoy your style a lot