I can confirm that my 2012 OBC is the same as your early 2012 OBC - and that my 2015 OBC is the same as your late 2012 OBC.
I guess I'll have to wait around for an early 2012. I dont want to mess around with the high power cables (cutting).
A little update...
So I purchased a Peugeot Ion 2015 OBC. Seems like they updated both the inverter and the OBC pretty early. My 2012 Ion is (?)number 12862 and they changed at number 13203->. Completely new OBC and inverter, but same connections. Not compatible with my car though. Argh!
My cars OBC is faulty and needs replacement. I do not have the skills to swap parts on the circuit boards so a swap of the entire unit is my only option.
I found an OBC salvaged from a 2017 I-MiEV not far from here as good as new. Will the part work with my older Peugeot? I see there are some...