I've got Fuzzibunz perfect fit, Fuzzibunz OS, Fuzzibunz Elite and can say that no other diaper I have is similar to them in fit or cut. I've got Sunbaby, Alva (fleece, suedecloth, bamboo and colorsnap versions) and none of them seem like same diaper. I always assumed Charlie Banana, but seeing a comparison picture between the two, they don't have the same cut either.
It is weird since Tereson said that "Even she couldn't tell the two apart" so it seems odd that in all the diapers I have tried, nothing seem that similar to Fuzzibunz.
This! Many are similar, but I have the Charlie Banana that was accused of copying FB, and it is different.