As you can see by the below comparison image, there is a slight shade difference on the body between these versions, and likewise on the symbol print. But these are normal batch-type variations that we wouldn't normally comment on. More significant is the hair - which is not just completely different in texture, but also in the rooting style.

This is a key sign that a curlyfrizz pony is not necessarily just in really bad condition, but that the whole hair process has been done differently. My childhood Baby Rain Ribbon (left) has an awful lot of hair pushed into very tightly punched holes. The other has much more gently rooted hair with gaps between the plugs.

The ponies with curlyfrizz hair do, as the name suggests, get frizzy much more easily than the silky type. But they do also often come with some factory curl, which is not ever seen on the silky versions. The curl shown in the picture at the top of the page is original to the pony. She came off the card with her hair like this.