First how does one define a "big brand"?
If it's purely on the basis of sales, then it's definitely not Newberry (and none of the other big names from the UK). If measured on marketing and publicity then again Newbery is not the one (as no one outside the UK has heard of Newbery. GM, Kookaburra , Woodworm, Puma and GN score here).
I would say for me a a "big brand" is one which can offer a balanced mix of quality and money and one on which I can place my trust to perform up to my expectations. These are exactly the parameters that Newbery is unbeatable on.
Till recently Newbery has been innovating within the ethical parameters of cricket. They were probably one of the later ones to come out with carbon handles and that to only for the UZI and one other profile. Gray Nicolls has spoilt the sport by introducing Titanium and Carbon handles. I am yet to come across a professional player who uses these so called revolutionary handles.
For me Newbery is at the epitome of bat making.
If you want fancy labels these can purchased and put on any bat.
It's the bats performance (and also how well it is used) that is noted.
So do not spend money on buying big marketed brands. Many of them don't even make their own bats (Kookaburra, Woodworm, Puma are just examples).