Surely the NTSC version is more rare and a sought after collectors piece. There are a lot of exampled of these all over the plattforms.
For instance, in the PAL region there are different "codings" on the cartridge so a PAL game could differ hugely in price as well.
On the NES there was a game called Tiny Toon Adventures 2, an NTSC cart costs about 15$ a German PAL cart costs about the same.. a SCN (Scandinavia) coded cart costs about 125$. They are the same game in every instance except for a 3 letter code on the front page and 3 letter code on the back of the cartridge.







