区别就是两者意思是不一样,具体的不同如下

big fun中文意思是很大的乐趣,红杏出墙(歌名,Big Fun)

In 2006 birds from this collection became the basis of new collection "Songbirds" containing small and big fun steampunk birds.

newbigfun中文意思新的大乐趣