User blog comment:Kogath/Monster Hunter X Discussion/@comment-26836109-20150929015601/@comment-16331478-20151005120503

I'd say the biggest improvement is the framerate, I play MH4U with a friend of mine who has an original model, and those times we play in the same room it's so hard to look at his screen because I'm used to the higher framerate of the New 3DS. If you're buying a brand new handheld in the family there is no reason to not buy a New 3DS.

Also, judging from all the visual effects and improved textures MHX will sport, the changes will probably be even more noticeable.