To me it seems like an apples and oranges situation because Carrera is a polygon modeller [?not sure haven't demo'd it yet] or a modelling app any way, and Vue is the best 'landscape/terrain' modeller in the universe.

If Carrera has mesh editing available it would be useful to have, but for the investment of cash I'd go to Vue5Inf for the power, and look into a free ware polygon modeller, of which there are quite a few if you look, for the mesh editing and general model building that Vue with it's boolean modelling[like Bryce] can't accomplish.

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again