DN163K1B vs DN163K1C

[Herc Driver]

Hi Guys,

I just picked up the new Kato SD70ACe and have a small problem/question. Some websites indicate the correct decoder to use is the K1B while others claim the K1C should be used. Does any knowledgeable DCC guru's know which would be better to use? They measure out to be identical (according to Digitrax) but even Digitrax doesn't specifically indicate which decoder is better for that engine. Any ideas?

Thanks