Skaboa

Hi Folks, Want to get your thoughts, I have both Mamiya 645 and Mamiya 7 lens 45, 65, 80, 150 for both system, and want to adapt to my GFX 100 the OG version. I can't seem to find which lens system is best, i know they are all great glass from mamiya. But want to hear and pros and cons of adapting either system. The adapters are not cheap, so i want to get one system first. Appreciate the feedback.