"Quote - "I installed C5 just to see what it's like but I'm not at all sure what advantage I'd get with Cararra over Poser/Hexagon/Vue to be honest"

None IMO*"

(Sorry - recursive "quote" there..)

But I'm very grateful that now I can stop worrying about whether or not I should try and get Carrera.
Since I too also have Poser/Hex/Vue (and Blacksmith). That's an XMas prezzie all by itself (/me  ticks one worry off the list. Only umpteen hundreds to go..)

Cheers and happy new year (soon),
Diolma