Anyone had experiences comparing these two setups or any thoughts?
DOF control would probably go favourably to the RP/50mm but is the 32mm superior in sharpness?
I have been using the EFM32mm lens on the M5, M6 and M6 Mark II for more than two years now. I will go as far as saying - it's the lens the brings out the best in the 32mp M6 Mark II. Of course there's the fantastic Sigma 16mm and 56mm. They are stunning lenses too. I own the 16mm, and in the process of buying the 56mm.
Since the RF50mm came out, I've been using it for three months, first on the R and now on the R6. I've also used Canon's EF50mm 1.4 and EF50mm 1.8 on my R bodies.
Portability is my selfish intent - which is why I use the EFM32mm with the M6II for travel a lot. I'd sometimes leave my R bodies at home, seriously, for short trips with the family. It's that good. And since ISO6400 images from the M6II are so nicely denoised by the new DXO Pure Raw app, I must say I will keep doing this.
If the RF50mm 1.8 is my major lens on the R6, then there's not much point owning the R6 since I already own the M6II with the EFM32mm anyway. However, the RF50mm 1.8 is actually the lens I most seldom use for my R6.
If I were to choose between the M6II+EFM32mm combo versus the RP+RF50mm 1.8 combo, I will choose the former, not the latter. And please, it's not because the RP is a bad camera, far from. Among RF bodies now, I'd say the RP is my favorite for portraits off-cam. Perfect skin tones on my Tamron 85mm 1.8, and on any RF lens I've used so far, for that matter. I just find the M6II better at many aspects that matter to me, including reach (of course), 4k video (very good quality for my use), speed and portability. After acquiring the R6, I in fact decided to sell my RP because the R6 and the M6II are all that I need for my current use model for both paid gigs and leisure.
Lastly, this is not at all to get in the space of FF vs cropped debate. It's strictly my personal preference, and there is no pressure for anyone to agree, and therefore we can agree to disagree with no friction at all.
It’s clear that both setups are very similar in terms of IQ. And as expected, the RF/RF 50mm f1.8 does have shallower DOF. Other than that, seems pretty close to me looking at the posted pictures. For a lens 3x cheaper, it seems to hold out pretty well against the 32mm.
The 32 is the better lens; it’s just not married to RF mount. The 32 if it were RF, would be a 50mm f/2L, just no weather sealing and STM (instead of USM) for $499. That’s a better analogy.
Popco does their usual Imatests on both (32mm below):
https://www.popco.net/zboard/view.p...sc=&no=1081&ReviewUrl=canon_EF-M_32mm_04.html

32mm vignette, a benchmark of t-stop essentially, you can find this on Popco.
RF 50mm:
https://www.popco.net/zboard/view.p...ge=&desc=&no=1119&ReviewUrl=3_RF50.8_opt.html

RF 50mm vignette, note it has a full stop more vignette occurring on until f/4.
If you pay attention to those vignette charts, the 32mm is delivering substantially more light than the RF 50mm until you hit f/4, where at that point, it's a sharpness dogfight anyways; DoF and ISO handling are virtually moot at that point. Both are very sharp by f/4 I might add.
Make no mistake, as before, the 32 is the better lens. Now, I didn't say it was the better choice. Really it's up to the eye of the beholder here and use case intent, portability, price, etc, those are the bigger factors. But on sheer performance? The 32mm is "smoking" the RF 50mm f/1.8 STM if you check the imatest data out.
In my eyes, the real competitor to the EF-M 32mm f/1.4 STM is not the RF 50mm f/1.8 STM, it's an unreleased RF 50mm f/1.4 USM, should they ever do one. By f/2, the RF 50mm f/1.4 USM, if they ever make one, should trade blows with the EF-M 32mm f/1.4 STM. The 32mm trades blows alright though with the f/1.8 variant, and blows the house right down in my book.
Again though, don't pick the 32mm because of it's performance, pick it because of it's capabilities, if, you plan to go M. Part of the M's problem isn't the quality of the EF-M glass (it's quite good actually if you truly compare it), it's the lack of EF-M glass and support for it going forward. No fast normal zoom and lack of M5 Mark II, are big downers for folks like myself that have "cross over" with the FF crowd.