I don't want to start a flame war - but it appears to me it's going to be D|S - Bryce - Carrara.

EON(Vue) & E-Frontier(Poser)

Why I say this, is now Vue can actually import the Poser shader tree & their tightness has been growing ever stronger as the years have progressed,  there are differences but to tedious to get into.

I own both Carrara & Vue - so I'm not biased either way, but I am partial to Poser and have no plans to move to D|S.