Hi,
I just published this article comparing colour rendition of my P45+ using LR 5.3 with a few profiles and Capture One:
http://echophoto.dnsalias.net/ekr/index.php/photoarticles/79-p45-colour-renditionI don't pretend it is a piece of scientific work, just a summation of some experiments I did, with the purpose of finding the best way to handle colour in my workflow.
There are other good converters like RawTherapee and Raw Developer, these were not included this time.
Best regards
Erik