Simple questioin about SCCM 2012 R2 SP2 ADK for Windows 8.1

Hi,

I have SCCM 2012 R2 SP2 ADK for Windows 8.1. using above one I am deploying Windows 10 (Clean installation through PXE and Bootable Media), it is all working fine... However, my question:is it technically wrong to deploy Windows 10 while SCCM server use Windows 8.1 ADK??

Newlly, I have to try a scenario where I have to use USMT in TS for Windows 7 & 10... I am sure TS will fail to use ADK 8.1 to Windows 10 computers, socan I create new USMT package from ADK 1606 without deploying it on the server? o r this is technically wrong?

Thanks