CPU intel M-5Y71 lynx point and Emulation

Hi,
on fitc appears no emulation as default, it is recommended not to change anything?
I looked up the specifications of the cpu but I don’t understand what is the possible choice between:
Premium BDW U or Base BDW U
or
Premium BDW Y or BDW Y Base
Y refers to Y in the name of cpu?
thanks

UX305F.JPG

Don’t change anything, leave the SKU as it is.