That's one reason I fell in love with Nirvanas, the ones that *are* different in colors are usually really bright and colorful and a fun contrast to the U.S. versions
Like Dutchies and Argies, and now Colombians and Venezuelans. But yeah it does seem like there are always subtle differences, it just depends on how interesting it is for the collector I guess. If they look too close to the U.S. ones it's just not the same for me. Which is good when you have limited space anyway
I'm happy I don't get into princess variants, one less pricey thing to tempt my wallet!