I never prefer Budget Phones or Tablets.I would rather opt for Entry level Phone.
Budget Phones will give you what it says, but I have noticed too many problems in hardware & most of it is related to touch screen & processor(freezing),those are the parts that should be responsive & stable respectively.
Quality over Quantity, Period !
mreccentric
Many of these tablets might use a same operating system like Android, but the UI is different. And that's what makes me feel that buying a smartphone from a better manufacturing company is better.
The Legit "Android OS" UI is seen only in some of the high-end phones.
Take some Samsung's Galaxy phones, the OS is Android but the UI (most probably icons & launcher) is customized by the company.Samsung uses "Touchwiz".
Now, that's pretty common thing in Opensource softwares, you know.
Develop your own launcher & port it with Android OS & sell the product !
Almost every Android phones manufacturing companies do so to stand-out unique in the market.You can check UI of HTC,Sony & Samsung.