Personally I feel the rnhp has better synergy with the clear for a few reasons, I feel the rnhp more accurately represents natural presentation for the clear, it’s true that the clear doesn’t have that wide of a stage, and the g111 does end up being a wider amp than the rnhp, but the rnhp to me ends up having more precise placement and greater depth than the g111, and the g111 staging can feel unnatrual and inaccurate at times with the clear imo (as the g111 can exaggerate and artificially create stage whereas the rnhp will only feel as large as the recording, so imo it more accurately conveys the space the recording has to offer and will be more dependent on source material for it’s performance). Another reason I prefer the rnhp with the clear is timbre and overall organicness, the g111 is more studio neutral (personally I wouldn’t call the 111 warm imo) , but the rnhp ends up having more correct tonal density and better timbre than the g111 with the clear, where the g111 can sometimes sound either overly dry or lean leading to a bit unnatrual sound, so while the g111 is more deadpan neutral I would say the rnhp is more accurate to me for studio use as it’s closer to what I would hear naturally while still being very technical. I would also say that in terms of dynamics, while the g111 does have greater control and impact in the bass (the rnhp isn’t lacking impact or anything, but it can’t slam like the 111 can), the rnhp to me more accurately controls and presents dynamics overall outside of subbass with the clear. Generally I would say both are equally detailed for surface level detail and one doesn’t have a large edge over the other in this regard, the g111 might be a bit more forward with it’s detail but the rnhp more naturally presents that detail and might better convey low level detail imo, but I will actually say the rnhp can pull forward more harshness or flaws from some tracks where the g111 can at times more smooth that over (which is a benefit on the rnhp for studio but potentially a downside for casual listening, so the rnhp will shine more with better recorded music (and a better dac) but be more unpleasant with poor recordings)
I think the rnhp works well with the clear spatial recreation to enhance it’s placement and accuracy, ends up being more accurate with timbre and organicness, and also tends to better showcase the focal dynamics. The g111 feels more dead studio neutral (which can be nice) but also somewhat lacking when it comes to naturalness of sound and space (with the clear), whereas the rnhp feels more natural/neutral, I would still end up trusting the rnhp + clear more for studio than I would the g111 + clear, but both amps would allow for both accurate studio use and casual listening without being lacking in either respect.
Another thing to consider is what dac you plan to use, as the rnhp is more picky on what sounds accurate with it and can get harsh or unpleasant with the wrong dac (or spatially lacking if your dac is lacking on that regard, same for dynamics), where the g111 is more forgiving in that regard, generally I would say that the rnhp + bf2 or g111 + 1321 (or 1421) represents one of the better bang for buck dac pairing for each amp and that’s what I’ve gone off when I talk about these differences in sound assuming they are paired with these dacs. The reason I picked the bifrost 2 with the rnhp is that imo it doesn’t really knock off the balanced signature of the rnhp, helps add more weight to the bass, enhances timbre and body without getting sloppy or overly rich and colored, and is still very revealing overall. I will say the bifrost 2 is a bit smoother than neutral which can tame treble a bit but it’s not enough to cause any issues and is helpful for less than ideal recordings. The reason I say the soekris dacs with the g111 is that the soekris help to tame the stage of the g111 which does reduce width a tad but increases accuracy in it’s stage, enhances speed, improves treble detail and clarity, and generally makes it fairly linear sounding. The soekris doesn’t have the best timbre though, so I would say timbre could potentially be an issue but it’s not bad enough to where I would say it causes that much issue
In the end it’s going to come down to what you want out of the clear, what dac you plan to consider, and what you listen to. Overall the rnhp to me plays more to the strengths of the clear than the g111 does, but in the end either amp is going to get you a pretty satisfactory experience. And I would end up saying that if you go for multiple headphones that the g111 would be more versatile for multiple different types of cans (as the rnhp can struggle with some of the harder to drive planars), but if you want to focus on the clear, to me the rnhp is the one to get out of the two