I adore the EU SNES and find the NA SNES just heinous, but it's really more nostalgia driving preferences for most of us.
I do think both designs fit their relative regions though.
The NA one is big and chunky, with an aggressive eye catching angular and straight edges design, alongside a more monotone, straight forward overall palette, while the EU/JP design is more reserved and minimalist physically, all soft curves and low profile, but with a bit of a more traditionally cool look, contrasting with a colourful close up personal interface.
The NA one is a big bold muscle car, while the EU/JP one is a small refined sports car, basically.