I noticed in testing that there's a slight inconsistency between SAM and SSC behavior related to utility rate escalation. SAM applies whatever rate escalation you specify on top of inflation. SSC in the utilityrate module does not. I'm guessing that this is related to the fact that inflation_rate is a cashloan parameter and rate_escalation is a utilityrate parameter. So SAM, which does it all in one go, has access to all that information and synthesizes the two, but the SSC step by step can not. So it may be the case that nothing can really be done to make them behave the same way.
That said, it might be worth noting the difference in the documentation or parameter description somewhere. It might save the next person to come along a little time.