[Brightcolours]

With WB and tint settings, can we adjust all lenses to the same color? If it is true, people cannot claim a lens has better color than others as long as it can be adjusted in pp.

Why not? If they had good colour you didn't need to adjust anything, right?

When you have to use custom white balance just to have your particular lens behave like other lenses, you know it has a different colour. And as I noted before, often when people say a lens has better colour, what actually is going on is that the lens is more contrasty.