@aeilkema  - since you don't have Octane you can't make any judgements about Octane either

Octane works wonderfully well with Poser. And it is a lot faster as Poser with most modern NVidia videocards.

My experiences with Vue are from some years ago (Vue 8) and were not very good. A simple HDRI skymap took days to render.

Whether something looks good or not, is a matter of personal opinion. Both Vue, Firefly, Lux and Octane can make great realistic images. How good depends on your knowledge of the tool you use and your personal preference