You could say decent things about both brands really.
Plus around the Salix (Kent) area you also have the luxury of another amazing brand that is turning out some ridiculously responsive bats (H4L)!
But if you are determined to buy either Salix or Newbery then it is hard to beat either a TK-made Newbery, although an AJK-made Salix equals it.
If I were to choose between a Newbery and Salix then my choice would be Salix, as I have found them consistently high quality!!
But if I were in your shoes, rather than listening to us, I would take a trip to somewhere like Uzi Sports and try both brands in one place?
Then you can try different Salix and Newbery models and bats and tap them all up, feel how they pick up, and decide which is "The Bat" for you! And all that with a nice cuppa too!
Seriously it wouod be bettter to sped an hour or two going through both brands and choosing the right bat for you rather than choosing your next bat on reputation or hearsay alone?