Which Loop Format Recommended for Cubase 8.5 on WIN

Hi, I was wondering which is most recommended LOOP format to use within Cubase 8.5 Pro and up on WINDOWS platform?
Many packages sold are Multi-Format and include both WAV/ACID and REX. For the purpose of saving disk space I’d like to keep on my system only ONE format. Which would you recommend and why?

I’d love to know this as well. I can’t see a huge difference between the way Cubase handles either. Except for sometimes creating too much space in the Rex slices.

Use wave