My son(15, classical guitar) and I use this as both an Otamtone in the normal sense, and as a ribbon controller for a sampler, In both cases it gives a beautiful sound* through the much larger internal speaker, the ribbon is much easier to use with adult size hands (I find the original a little small) and the wah-wah mouth is excellent.
For me, the larger size, better ribbon controller, and controller, audio output, and external power make this is a big improvement on the original.
* In native mode it sounds like an original Otamatone but if you are reading this I assume you know what that sounds like.(it is not for everyone)