From what I read, the 45 has less CA. VC is better than reported by testers (they would mention 1/8s as a practical limit) : on Df and in quiet mode, going down to 1/4s is ok if you accept some misses. Not sure we can get down to 1/2s or even 1s as with the OM-D and a 20mm lens. I have yet to give it a try. But it is very usable and, IMHO, useful.
Concerning the colors, the comparative shots with Voigtländer 58/1.4 might be misleading because of different brightness. I'll try to redo that in PP.