I like the capabilities of the G9 but I don't like the size as well. I bought into MFT because of the size, coming from FF. The G9 is practically the size of a Nikon D750 from I have seen on the web. The GX9 is a bit neither here nor there. I still have my EM-5mk1 and have resisted from upgrading so far because nothing has been compelling enough for me. The E-M1mk2 certainly came close but the price put me off. I will probably go and take a look at the G9 to assess myself.
Oh, you have both now? I am also considering the GX9 and it looks to be pretty much the same as the GX85 size wise. I am mostly a holiday photographer and maybe will use it for events with family and friends. As such, I think the G9 may be a bit of an overkill. It would be interesting to learn from your experience using both the GX85 and the G9.