DA14581

Hi,
Our board will be designed as a co-layout board.
We can't make a decision now on which chip we will use, maybe DA14581 or DA14585.
Thus, I am worry about which SDK is more suitable for out project.
如果我选择SDK 6.0.3,是否可以运行ample code both on DA14581 and DA14585? How?
Is there a definition such as "#define LET_THE_CODE_FOR_DA14581" and I can switch the code is for DA14581 or DA14585 by editing the definition?
Thank you.