Not really, but it gets better...
...the body harness connectors were all the same across years, except for one. In the 2011 there's an 18 (used) pin that sits up behind the dash cluster area that joins to the engine bay/fuse box harness - well, in addition to the aforementioned mirror/overhead/shifter differences. In later builds (presumably 13/14) this connector is replaced with two separate connectors that live down in the left footwell, so I have a mismatch.
This means I get to swap out the engine bay harness/fuse box too! Yippee. I could just cut and splice the 2014 connectors (already confirmed pins are all replicated equally other than the second 2011 amp, which I don't need - 2014 combined them into one), but I don't want to ruin the 2014 harness until I'm sure I don't need it. If I want to go with the HIDs (along with anything else I'm not thinking of) eventually, then I'd rather it was unmolested.
So current plan is to swap in the 2014 body harness AND bay harness, HIDs, and probably the SJB as well. Then test and see if everything works. I figure I'll have to tell the PCM that it's got a new SJB, and probably eventually flash the PCM to 2014 strategy.
If that doesn't work out, then I'll put all the 2011 wiring back in and just hack the outstanding necessities together.
What a timeframe setback! The pursuit of stock-ish wiring perfection plagues me.
2011 C263
Was replaced with
2014 C264 & C265