Creek OBH-12 vs Creek OBH-22 passive preamp

What is the difference, other than chassis color, between the older and current model of passive preamp by Creek? Thanks in advance.
I would think that creek would have put its pride into improvements between models... and the OBH-12 has some shortcomings... how about the OBH-22 being "quite BETTER" ??
From a recent email question to Roy Hall on the question:

The only difference is 3 inputs instead of 2...