Dual Screen worth it?

Hello,

so with the new Retroid Duo and the ever so popular Ayn Thor on the market I am wondering if the Dual Screen is worth getting as the only retro handheld in my possession. I would like to play the DS/3DS games like Pokemon, Zelda or Fire Emblem, but does is it even matter that much when I don't play those consoles exclusively? I have seen the setup on the Retroid 5 with the two screens side by side and that does look alright.

So what do you guys think?