It sounds terrible and inhuman, but there is definitely some similarity to the target voices. It's much easier to detect the similarity when you compare the different voices to each other saying the same phrase, instead of just listening to one in isolation
Thanks for taking a look. Agreed Alan Rickman sounds better than others. Partly because, I couldn't harvest that many sound samples with others for training. The commercial ones have their voices recorded exclusively in studios under controlled settings (besides using concatenative synthesis, so the sound bits are real recorded streams).
Alan Rickman seems clearer than the others.