I don't have an A4-SFX but I do have a Ncase. I have managed to strip 3 of the screws in my M1 because both the screws and frame is aluminum. The MI-6 uses threaded inserts and I have had no problems with them. My M1 is anodized aluminum and personally I prefer the powder coating of the MI-6. Seems more durable and doesn't show finger prints as bad.
That is my main gripe about the NCASE M1... it's so easy to strip the screws holes (happened to both screw holes for my graphics card mount). I love the steel thread inserts in the CCD MI-6.
I currently have builds in the NCASE M1 (Ryzen 7 1800X -- but may be putting my i7-8700K system that's currently in a NZXT S340 Elite in there soon as I want to go minimalist for my main system), the CCD MI-6 (i5-8600K), and a Dan Case A4-SFX v2 (Ryzen 7 1700). Of the three, I like the CCD MI-6 the best as far as looks and portability. I take this system with me when I travel to visit my daughter in another state so that I can work remotely--I do finite element analysis work, and even a powerful laptop gets way too hot when performing an analysis that can run for several hours.
Interesting. Apart from the size (obviously) how do you think MI-6 is better compared to M1 and A4?
Here are my +/- for each of the cases:
NCASE M1
+ CPU cooler height (130 mm)
+ removable panels (I have a set of silver and a set of black that I can swap)
+ full length GPU
+ quiet-running (due to support for tower coolers and full length GPUs with more than one fan--even when on full load)
+ cable management (room to tuck away cables)
- screw holes are easy to strip (no steel thread inserts into the aluminum)
- removable panels (Yes, this is a minus also -- they come off too easy when picking up the system for transport.)
- fingerprint magnet (on the black panels)
- size (although the larger size allows for tower CPU coolers and large GPUs, it's not as easily transported as the other two)
DAN A4-SFX (v2)
+ size (easily fits in backpack)
+ screws to help hold side panels on (I'm not a fan of quick remove panels--I'm not afraid to use a screwdriver from time to time)
+ full length GPU
- CPU cooler height (48 mm) -- this really limits your CPU choice if you are air cooling (you can delid your CPU if you are so inclined to run a beefier CPU, or you can go the 92 mm AIO route)
- PCIe riser is mounted too high so taller GPUs with top power plugs are tough to deal with (makes it really tough to get the 6/8-pin power connectors to my MSI GTX 1070 Gaming X bent enough to attach the top of the case)
- cable management (tight space really makes custom length cables a must)
- fingerprint magnet (mine is black)
CCD MI-6 (1st batch, minimalist case with no USB/power on front)
+ size (easily fits in a backpack--has the smallest footprint of the three cases)
+ steel thread inserts (Yay! No stripping of threads)
+ powder coat finish (doesn't show finger prints easily, although can get a little scuffed when transporting in a backpack)
+ lid/sides attached with screws (everything stays on until you want it to come off)
+ GPU retention bracket on back (absolutely fantastic way of securing the GPU bracket--a single tool-less screw secures the bracket)
+ ventilation (good opening-to-metal ratio for better cooling)
+/- CPU cooler (65 mm) -- can fit a Noctua NH-L12 (with 92 mm fan only) -- without CPU delidding, you are still somewhat limited on how powerful a CPU you can adequately cool in this case. I'm running an i5-8600K with a -0.050 V offset and a NH-L12 (92 mm fan only), and my full load temperatures get to 78 to 79 C. I had to turn off the XMP profile of my 3000 MHz RAM and run it at 2133 MHz to keep my CPU temperatures below 85 C.
- Short GPUs (although some powerful GPUs are available in ITX form, options are somewhat limited)
- cable management (tight space really makes custom length cables a must--bunching cables have also kept me from utilizing the extra 2.5" drive mount)
- not quiet (On full load, the single-fan GPUs can get quite loud. If your CPU fan is on top of the heat sink and is close to the sides of the case, air turbulence can make a full load system pretty loud. The 92 mm fan being on the bottom of the NH-L12 helps with this, but can still be relatively loud.)
I'm probably in the minority here, but I prefer air coolers over liquid cooling (especially for systems that I have to travel with--you won't be taking a liquid cooled system in a carry-on onto an airplane).