This one I think boils down to bad ACR support for the sensor. Just like ACR does weird things with X-Trans.
I believe the raw is pre-cooked, I'd rather it weren't, and that could be the cause of the texture you are referencing, but I think this texture can be avoided in a raw processor-dependent manner.
If I had to use Lightroom, I'd be much less satisfied with A7RII image quality.
Yeah, about that...
I've had and used both for years now. All my medium format stuff is in C1 as are tens of thousands of other images, often from cameras that C1 supports first or stuff where I've tried both, or where the tethering seemed easier, whatever. One is never truly truly deeply expert with any of them. And for sure, with many cameras, there is a tiny and sometimes not so tiny benefit to one over the other and that one is, more often than not, Capture One. I don't like using it because over the years it has done some horrible things to me (once losing my LCCs in an upgrade, for example, which was a real bummer) and because it has also, over the years, littered my various hard drives with files in all sorts of unexpected places and even now, refuses (yeah I know I could hunt down and trash some preferences file) to export to any folder other than one I specified years ago, even though I keep on deleting it. So from a usability and DAM and pure reliability point of view, my great great preference is LR even if C1 might have the edge on pure RAW decoding in some circumstances.
Generally it isn't enough of an edge for me to worry about but sometimes I will use it for a stage one RAW decode with all options off, then export to LR for finishing and DAM and for LR printing, which is often very useful.
So of course I have tried this with the Sony files and the files do indeed, out of the can, look better in C1.
85% (roughly) of the reason they look better in C1 is that C1 has, IMHO and for my purposes, less useful sharpening than LR. It seems to have a crude unsharp mask system and in my hands at least, is not as useful for sharpening fine detail - which is really needed with the current state of the art in high mp sensors and very sharp lenses. Another 5% of the benefit is the quite bland profiling, a nice place to start but not to end up.
If I use C1 to export to 16bit Prophoto tiff with no sharpening, corrections or NR and then I import to LR and get the file where I want it in terms of sharpening and NR and profiling, there is almost no benefit remaining.
What I can say with 100% certainty for my own satisfaction is that the orange peel effect is there in C1 as well. It would probably be
slightly less pronounced, if one were able to level the playing field which, because of import profiling one cannot do, but it is still there.
Now in many, probably most, cases it doesn't matter. But orange peel it is, and orange peel it stays, and whatever concoction of pre-cooking and compression is responsible for it, C1 is not a magic wand that makes it disappear other, largely, than through low default sharpening and high default NR.
D810 files have a little peel too, if pushed around, but you have to push. With the RII I see it all the time and despite the fact that it generally doesn't matter, like Canon banding, I know it is there...