Don’t know the specific differences to Reaper, but you might want to post in the Cubase LE and Wavelab LE forums for more answers.
I wondered, about the Zoom recorder, do you record multichannel files with that, or only stereo? I guess it does both.
If you’re into song writing, a big advantage of Cubase is the song composition tools such as chord track, and it comes with a better plugin suite and sounds vs REAPER which is quite vanilla.