only Chase Fuggler variants have a golden button-hole. The lilac-and-green rabbit is on of six ''limited edition'' models, the first batch of new models by the new producer Addo Play. there are only four Chase variants, created by former producer Spinmasters, but some reproduced by Addo (like the black Count Fuggula you got here). all four Chase Fugglers not only have a gold button, but are also made of burlap (as opposed to felt, fuzz or fur like 'regular' Fugglers) and have glow in the dark eyes and teeth.
I am pretty sure I had one of the rarest fugglers but I can't find it. I have an idea where it could be but it is very hard to reach without a ladder so i just have to wait for the right time