Ayn Thor vs Ayaneo Pocket DS vs Anbernic RG DS: which is overall better. Why should I one over the other

Hi. I'm looking to buy a dual screen handheld to replace my New 3DS XL. I love my 3ds, but it's getting old, people are buying it for insane prices despite these emulator handhelds being overall better, and I just want something with more power. Enough power to play "everything" below the Xbox One/PS4 and above era/power of gaming and play it on the go

I've looked into a lot of reviews on these but so far I'm leaning towards the AYN Thor since it seems to be more powerful than the Anbernic for similar pricing but cheaper than the Ayaneo for only slightly less powerful. However idk if these are exaggerations or truthful. I also don't know if I'm missing other factors from experienced people who own one or 2 or all 3

What am I looking for? 3 main things. Enough power to play something like Left 4 Dead 2 or Fallout New Vegas either via Xbox 360 emulation or PC versions, portability/ "pocket ability" and finally which one will last longer both in battery life and durability of the hardware over time. I'm also concerned with things like erganomics, ease of set up and such but those aren't as important to me

So what are some pros and cons you'd say for all of them. Why should I get one over the other. Is the Thor overrated?