First of all, the ChuwiHi10 has no aluminium body. It is sturdy but plastic. Second it has a 10.1 inch 1920×1200 px displY in contrast to the other tablets with their 2516×1536 px display. So, different size, different ratio and slightly different ppi. This will probably give you a better runtime on the chuwi.
Another difference are the 2 big USB ports on the Chuwi for a good connectivity.
Fo me the chuwi is a good crossover between subnotebook and tablet, while the other two are more aiming to be a iPad like premium tablet. But as I havent seen the Onda and Teclast that is a mere guess, given by the specs.
