Hello nojukebox,
thanks for your interest in our products.
As Rickard mentioned, Nuendo and WaveLab basically are intended to be used in different environments.
While WaveLab is a music mastering, analysis and audio error correction application typically used for
audio (pre)mastering and refinement, Nuendo is a comprehensive post-production software used in
film/TV/ADR/game audio and professional music studio environments.
I recommend to check out the following short descriptions on both products:
Why Nuendo website: http://www.steinberg.net/en/products/nuendo_range/nuendo/why_nuendo.html
Why WaveLab website: WaveLab: Audio Mastering Software | Steinberg
Please PM me in case you have any further questions, I’m glad to help.
Best,
Timo